John Gill

On Psalms 51:7

Purge me with hyssop,.... Or "thou shalt purge me with hyssop" (f); or "expiate me"; which was used in sprinkling the blood of the paschal lamb on the door posts of the Israelites in Egypt, that the destroying angel might pass over them, Exodus 12:22; and in the cleansing of the leper, Leviticus 14:4; and in the purification of one that was unclean by the touch of a dead body, &c. Numbers 19:6; which the Targum on the text has respect to; and this petition of the psalmist shows that he saw himself a guilty creature, and in danger of the destroying angel, and a filthy creature like the leper, and deserving to be excluded from the society of the saints, and the house of God; and that he had respect not hereby to ceremonial sprinklings and purifications, for them he would have applied to a priest; but to the sprinkling of the blood of Christ, typified thereby; and therefore he applies to God to purge his conscience with it; and, as Suidas (g) from Theodoret observes, hyssop did not procure remission of sins, but has a mystical signification, and refers to what was meant by the sprinkling of the blood of the passover; and then he says,

and I shall be clean; thoroughly clean; for the blood sprinkled on the heart by the spirit clears it from an evil conscience, purges the conscience from dead works, and cleanses from all sin;

wash me; or "thou shall wash me" (h); alluding to the washing at the cleansing of a leper, and the purification of an unclean person, Leviticus 14:8; but had in view the fountain of Christ's blood, in which believers are washed from all their sins, Zechariah 13:1;

and I shall be whiter than snow; who was black with original corruption, and actual transgressions; but the blood of Christ makes not only the conversation garments white that are washed in it; but even crimson and scarlet sins as white as wool, as white as snow, and the persons of the saints without spot or blemish, Revelation 7:14, Ephesians 5:25; "whiter than the snow" is a phrase used by Homer (i), and others, to describe what is exceeding white.

(f) "purificabis me", Pagninus, Montanus; "exiabis me", Vatablus, Musculus, Cocceius, Gejerus. (g) In voce (h) "lavabis me", V. L. Pagninus, Montanus, Vatablus, Musculus, Cocceius. (i) Iliad. 10. v. 437. So Martial. l. 7. Epigr. 27. Ovid. Amor. l. 3. Eleg. 6.

Keil & Delitzsch

On Psalms 51:7-9

The possession of all possessions, however, most needed by him, the foundation of all other possessions, is the assurance of the forgiveness of his sins. The second futures in Psa 51:9 are consequents of the first, which are used as optatives. Psa 51:9 recalls to mind the sprinkling of the leper, and of one unclean by reason of his contact with a dead body, by means of the bunch of hyssop (Lev. 14, Num. 19), the βοτάνη καθαρτική (Bhr, Symbol. ii. 503); and Psa 51:9 recalls the washings which, according to priestly directions, the unclean person in all cases of uncleanness had to undergo. Purification and washing which the Law enjoins, are regarded in connection with the idea implied in them, and with a setting aside of their symbolic and carnal outward side, inasmuch as the performance of both acts, which in other cases takes place through priestly mediation, is here supplicated directly from God Himself. Manifestly בּאזוב (not כבאזוב) is intended to be understood in a spiritual sense. It is a spiritual medium of purification without the medium itself being stated. The New Testament believer confesses, with Petrarch in the second of his seven penitential Psalms: omnes sordes meas una gutta, vel tenuis, sacri sanguinis absterget. But there is here no mention made of atonement by blood; for the antitype of the atoning blood was still hidden from David. The operation of justifying grace on a man stained by the blood-red guilt of sin could not, however, be more forcibly denoted than by the expression that it makes him whiter than snow (cf. the dependent passage Isa 1:18). And history scarcely records a grander instance of the change of blood-red sin into dazzling whiteness than this, that out of the subsequent marriage of David and Bathsheba sprang Solomon, the most richly blessed of all kings. At the present time David's very bones are still shaken, and as it were crushed, with the sense of sin. דּכּית is an attributive clause like יפעל in Psa 7:16. Into what rejoicing will this smitten condition be changed, when he only realizes within his soul the comforting and joyous assuring utterance of the God who is once more gracious to him! For this he yearns, viz., that God would hide His face from the sin which He is now visiting upon him, so that it may as it were be no longer present to Him; that He would blot out all his iniquities, so that they may no longer testify against him. Here the first part of the Psalm closes; the close recurs to the language of the opening (Psa 51:3).

Matthew Henry

On Psalms 51:7-13

I. See here what David prays for. Many excellent petitions he here puts up, to which if we do but add, "for Christ's sake," they are as evangelical as any other.

1. He prays that God would cleanse him from his sins and the defilement he had contracted by them (Psa 51:7): "Purge me with hyssop; that is, pardon my sins, and let me know that they are pardoned, that I may be restored to those privileges which by sin I have forfeited and lost." The expression here alludes to a ceremonial distinction, that of cleansing the leper, or those that were unclean by the touch of a body by sprinkling water, or blood, or both upon them with a bunch of hyssop, by which they were, at length, discharged from the restraints they were laid under by their pollution. "Lord, let me be as well assured of my restoration to thy favour, and to the privilege of communion with thee, as they were thereby assured of their re-admission to their former privileges." But it is founded upon gospel-grace: Purge me with hyssop, that is, with the blood of Christ applied to my soul by a lively faith, as water of purification was sprinkled with a bunch of hyssop. It is the blood of Christ (which is therefore called the blood of sprinkling, Heb 12:24), that purges the conscience from dead works, from that guilt of sin and dread of God which shut us out of communion with him, as the touch of a dead body, under the law, shut a man out from the courts of God's house. If this blood of Christ, which cleanses from all sin, cleanse us from our sin, then we shall be clean indeed, Heb 10:2. If we be washed in this fountain opened, we shall be whiter than snow, not only acquitted but accepted; so those are that are justified. Isa 1:18, Though your sins have been as scarlet, they shall be white as snow.

2. He prays that, his sins being pardoned, he might have the comfort of that pardon. He asks not to be comforted till first he is cleansed; but if sin, the bitter root of sorrow, be taken away, he can pray in faith, "Make me to hear joy and gladness (Psa 51:8), that is, let me have a well-grounded peace, of thy creating, thy speaking, so that the bones which thou hast broken by convictions and threatenings may rejoice, may not only be set again, and eased from the pain, but may be sensibly comforted, and, as the prophet speaks, may flourish as a herb." Note, (1.) The pain of a heart truly broken for sin may well be compared to that of a broken bone; and it is the same Spirit who as a Spirit of bondage smites and wounds and as a Spirit of adoption heals and binds up. (2.) The comfort and joy that arise from a sealed pardon to a penitent sinner are as refreshing as perfect ease from the most exquisite pain. (3.) It is God's work, not only to speak this joy and gladness, but to make us hear it and take the comfort of it. He earnestly desires that God would lift up the light of his countenance upon him, and so put gladness into his heart, that he would not only be reconciled to him, but, which is a further act of grace, let him know that he was so.

3. He prays for a complete and effectual pardon. This is that which he is most earnest for as the foundation of his comfort (Psa 51:9): "Hide thy face from my sins, that is, be not provoked by them to deal with me as I deserve; they are ever before me, let them be cast behind thy back. Blot out all my iniquities out of the book of thy account; blot them out, as a cloud is blotted out and dispelled by the beams of the sun," Isa 44:22.

4. He prays for sanctifying grace; and this every true penitent is as earnest for as for pardon and peace, Psa 51:10. He does not pray, "Lord, preserve me my reputation," as Saul, I have sinned, yet honour me before this people. No; his great concern is to get his corrupt nature changed: the sin he had been guilty of was, (1.) An evidence of its impurity, and therefore he prays, Create in me a clean heart, O God! He now saw, more than ever, what an unclean heart he had, and sadly laments it, but sees it is not in his own power to amend it, and therefore begs of God (whose prerogative it is to create) that he would create in him a clean heart. He only that made the heart can new-make it; and to his power nothing is impossible. He created the world by the word of his power as the God of nature, and it is by the word of his power as the God of grace that we are clean (Joh 15:3), that we are sanctified, Joh 17:17. (2.) It was the cause of its disorder, and undid much of the good work that had been wrought in him; and therefore he prays, "Lord, renew a right spirit within me; repair the decays of spiritual strength which this sin has been the cause of, and set me to rights again." Renew a constant spirit within me, so some. He had, in this matter, discovered much inconstancy and inconsistency with himself, and therefore he prays, "Lord, fix me for the time to come, that I may never in like manner depart from thee."

5. He prays for the continuance of God's good-will towards him and the progress of his good work in him, Psa 51:11. (1.) That he might never be shut out from God's favour: "Cast me not away from thy presence, as one whom thou abhorrest and canst not endure to look upon." He prays that he might not be thrown out of God's protection, but that wherever he went, he might have the divine presence with him, might be under the guidance of his wisdom and in the custody of his power, and that he might not be forbidden communion with God: "Let me not be banished thy courts, but always have liberty of access to thee by prayer." He does not deprecate the temporal judgments which God by Nathan had threatened to bring upon him. "God's will be done; but, Lord, rebuke me no in thy wrath. If the sword come into my house never to depart from it, yet let me have a God to go to in my distresses, and all shall be well." (2.) That he might never be deprived of God's grace: Take not thy Holy Spirit from me. He knew he had by his sin grieved the Spirit and provoked him to with draw, and that because he also was flesh God might justly have said that his Spirit should no more strive with him nor work upon him, Gen 6:3. This he dreads more than any thing. We are undone if God take his Holy Spirit from us. Saul was a sad instance of this. How exceedingly sinful, how exceedingly miserable, was he, when the Spirit of the Lord had departed from him! David knew it, and therefore begs thus earnestly: "Lord, whatever thou take from me, my children, my crown, my life, yet take not thy Holy Spirit from me" (see Sa2 7:15), "but continue thy Holy Spirit with me, to perfect the work of my repentance, to prevent my relapse into sin, and to enable me to discharge my duty both as a prince and as a psalmist."

6. He prays for the restoration of divine comforts and the perpetual communications of divine grace, Psa 51:12. David finds two ill effects of his sin: - (1.) It had made him sad, and therefore he prays, Restore unto me the joy of thy salvation. A child of God knows no true nor solid joy but the joy of God's salvation, joy in God his Saviour and in the hope of eternal life. By wilful sin we forfeit this joy and deprive ourselves of it; our evidences cannot but be clouded and our hopes shaken. When we give ourselves so much cause to doubt of our interest in the salvation, how can we expect the joy of it? But, when we truly repent, we may pray and hope that God will restore to us those joys. Those that sow in penitential tears shall reap in the joys of God's salvation when the times of refreshing shall come. (2.) It had made him weak, and therefore he prays, "Uphold me with the free Spirit: I am ready to fall, either into sin or into despair; Lord, sustain me; my own spirit" (though the spirit of a man will go far towards the sustaining of his infirmity) "is not sufficient; if I be left to myself, I shall certainly sink; therefore uphold me with thy Spirit, let him counterwork the evil spirit that would cast me down from my excellency. Thy Spirit is a free spirit, a free gent himself, working freely" (and that makes those free whom he works upon, for where the Spirit of the Lord is there is liberty) - "thy ingenuous princely Spirit." He was conscious to himself of having acted, in the matter of Uriah, very disingenuously and unlike a prince; his behaviour was base and paltry: "Lord," says he, "let thy Spirit inspire my soul with noble and generous principles, that I may always act as becomes me." A free spirit will be a firm and fixed spirit, and will uphold us. The more cheerful we are in our duty the more constant we shall be to it.

II. See what David here promises, Psa 51:13. Observe,

1. What good work he promises to do: I will teach transgressors thy ways. David had been himself a transgressor, and therefore could speak experimentally to transgressors, and resolves, having himself found mercy with God in the way of repentance, to teach others God's ways, that is, (1.) Our way to God by repentance; he would teach others that had sinned to take the same course that he had taken, to humble themselves, to confess their sins, and seek God's face; and, (2.) God's way towards us in pardoning mercy; how ready he is to receive those that return to him. He taught the former by his own example, for the direction of sinners in repenting; he taught the latter by his own experience, for their encouragement. By this psalm he is, and will be to the world's end, teaching transgressors, telling them what God had done for his soul. Note, Penitents should be preachers. Solomon was so, and blessed Paul.

2. What good effect he promises himself from his doing this: "Sinners shall be converted unto thee, and shall neither persist in their wanderings from thee, nor despair of finding mercy in their returns to thee." The great thing to be aimed at in teaching transgressors is their conversion to God; that is a happy point gained, and happy are those that are instrumental to contribute towards it, Jam 5:20.

Spurgeon's Treasury of David

On Psalms 51:7

Purge me with hyssop. Sprinkle the atoning blood upon me with the appointed means. Give me the reality which legal ceremonies symbolise. Nothing but blood can take away my blood stains, nothing but the strongest purification can avail to cleanse me. Let the sin offering purge my sin. Let him who was appointed to atone, execute his sacred office on me; for none can need it more than I. The passage may be read as the voice of faith as well as a prayer, and so it runs-"Thou wilt purge me with hyssop, and I shall be clean." Foul as I am, there is such power in the divine propitiation, that my sin shall vanish quite away. Like the leper upon whom the priest has performed the cleansing rites, I shall again be admitted into the assembly of thy people and allowed to share in the privileges of the true Israel; while in thy sight also, through Jesus my Lord, I shall be accepted. Wash me. Let it not merely be in type that I am clean, but by a real spiritual purification, which shall remove the pollution of my nature. Let the sanctifying as well as the pardoning process be perfected in me. Save me from the evils which my sin has created and nourished in me. And I shall be whiter than snow. None but thyself can whiten me, but thou canst in grace outdo nature itself in its purest state. Snow soon gathers smoke and dust, it melts and disappears; thou canst give me an enduring purity. Though snow is white below as well as on the outer surface, thou canst work the like inward purity in me, and make me so clean that only an hyperbole can set forth my immaculate condition. Lord, do this; my faith believes thou wilt, and well she knows thou canst. Scarcely does Holy Scripture contain a verse more full of faith than this. Considering the nature of the sin, and the deep sense the psalmist had of it, it is a glorious faith to be able to see in the blood sufficient, nay, all sufficient merit entirely to purge it away. Considering also the deep natural inbred corruption which David saw and experienced within, it is a miracle of faith that he could rejoice in the hope of perfect purity in his inward parts. Yet, be it added, the faith is no more than the word warrants, than the blood of atonement encourages, than the promise of God deserves. O that some reader may take heart, even now while smarting under sin, to do the Lord the honour to rely thus confidently on the finished sacrifice of Calvary and the infinite mercy there revealed.

Tyndale Study Notes

On Psalms 51:7

51:7 Purify me from my sins (literally Purify me with the hyssop branch; see Exod 12:22; Lev 14:4; John 19:29; Heb 9:19): The psalmist depends on God to purify and renew him (see Isa 1:18).

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