John Gill

On Deuteronomy 31:22

Moses therefore wrote this song the same day,.... The same day it was dictated to him by divine inspiration; he wrote it, as Josephus says (d),"in hexameter verse, which he left in the holy Bible or book (the Pentateuch), containing (as he adds) a prophecy of things future, according to which all things have been done, and are done; and in nothing of it has he erred from the truth;''which is a very just account of it, and worthy of observation:

and taught it the children of Israel; instructed them in the meaning of it, directed them to repeat it frequently, to lay it up in their memories, and often meditate upon it; as being a divine composition, and of great importance, as the consideration of it will make appear.

(d) Antiqu. l. 4. c. 8. sect. 44.

Keil & Delitzsch

On Deuteronomy 31:19-23

"And now," sc., because what was announced in Deu 31:16-18 would take place, "write you this song." "This" refers to the song which follows in ch. 32. Moses and Joshua were to write the song, because they were both of them to strive to prevent the apostasy of the people; and Moses, as the author, was to teach it to the children of Israel, to make them learn it, that it might be a witness for the Lord (for Me) against the children of Israel. "This" is defined still further in Deu 31:20, Deu 31:21 : if Israel, through growing satisfied and fat in its land, which was so rich in costly good, should turn to other gods, and the Lord should visit it in consequence with grievous evils and troubles, the song was to answer before Israel as a witness; i.e., not only serve the Lord as a witness to the people that He had foretold all the evil consequences of apostasy, and had given Israel proper warning (Knobel), but to serve, as we may see from Deu 31:20, Deu 31:21, and from the contents of the song, as a witness, on the one hand, that the Lord had conferred upon the people so many benefits and bestowed upon them such abundant blessings of His grace, that apostasy from Him was the basest ingratitude, for which they would justly be punished; and, on the other hand, that the Lord had not rejected His people in spite of the punishments inflicted upon them, but would once more have compassion upon them and requite their foes, and thus would sanctify and glorify Himself as the only true God by His judgments upon Israel and the nations. The law, with its commandments, promises, and threats, was already a witness of this kind against Israel (cf. Deu 31:26); but just as in every other instance the appearance of a plurality of unanimous witnesses raises the matter into an indisputable truth, so the Lord would set up another witness against the Israelites besides the law, in the form of this song, which was adapted to give all the louder warning, "because the song would not be forgotten out of the mouths of their seed" (Deu 31:21). The song, when once it had passed into the mouths of the people, would not very readily vanish from their memory, but would be transmitted from generation to generation, and be heard from the mouths of their descendants, as a perpetual warning voice, as it would be used by Israel for God knew the invention of the people, i.e., the thoughts and purposes of their heart, which they cherished (עשׂה used to denote the doing of the heart, as in Isa 32:6) even then before He had brought them into Canaan. (On Deu 31:20, vid., Deu 7:5; Deu 9:5, and Exo 3:8.) - In Deu 31:22 the result is anticipated, and the command of God is followed immediately by an account of its completion by Moses (just as in Exo 12:50; Lev 16:34, etc.). - After this command with reference to the song, the Lord appointed Joshua to the office which he had been commanded to take, urging him at the same time to be courageous, and promising him His help in the conquest of Canaan. That the subject to ויצו is not Moses, but Jehovah, is evident partly from the words themselves, "I will be with thee' (vid., Exo 3:12). (Note: Knobel's assertion (on Num 27:23) that the appointment of Joshua on the part of Moses by the imposition of hands, as described in that passage, is at variance with this verse, scarcely needs any refutation. Or is it really the case, that the installation of Joshua on the part of God is irreconcilable with his ordination by Moses?)

Matthew Henry

On Deuteronomy 31:22-30

Here, I. The charge is given to Joshua, which God has said (v. 14) he would give him. The same in effect that Moses had given him. The same in effect that Moses had given him (v. 7): Be strong and of a good courage, v. 23. Joshua had now heard from God so much of the wickedness of the people whom he was to have the conduct of as could not but be a discouragement to him: "Nay," says God, "how bad soever they are, thou shalt go through thy understanding, for I will be with thee. Thou shalt put them into possession of Canaan. If they afterwards by their sin throw themselves out of it again, that will be no fault of thine, nor any dishonour to thee, therefore be of good courage."

II. The solemn delivery of the book of the law to the Levites, to be deposited in the side of the ark, is here again related (v. 24-26), of which before, v. 9. Only they are here directed where to treasure up this precious original, not in the ark (there only the two tables were preserved), but in another box by the side of the ark. It is probable that this was the very book that was found in the house of the Lord (having been somehow or other misplaced) in the days of Josiah (Ch2 34:14), and so perhaps the following words here, that it may be a witness against thee, may particularly point at that event, which happened so long after; for the finding of this very book occasioned the public reading of it by Josiah himself, for a witness against a people who were then almost ripe for their ruin by the Babylonians.

III. The song which follows in the next chapter is here delivered to Moses, and by him to the people. He wrote it first (v. 22), as the Spirit of God indited it, and then spoke it in the ears of all the congregation (v. 30), and taught it to them (v. 22), that is, gave out copies of it, and ordered the people to learn it by heart. It was delivered by word of mouth first, and afterwards in writing, to the elders and officers, as the representatives of their respective tribes (v. 28), by them to be transmitted to their several families and households. It was delivered to them with a solemn appeal to heaven and earth concerning the fair warning which was given them by it of the fatal consequences of their apostasy from God, and with a declaration of the little joy and little hope Moses had in and concerning them. 1. He declares what little joy he had had of them while he was with them, v. 27. It is not in a passion that he says, I know thy rebellion (as once he said unadvisedly, Hear now, you rebels), but it is the result of a long acquaintance with them: you have been rebellious against the Lord. Their rebellions against himself he makes no mention of: these he had long since forgiven and forgotten; but they must be made to hear of their rebellions against God, that they may be ever repented of and never repeated. 2. What little hopes he had of them now that he was leaving them. From what God had now said to him (v. 16) more than from his own experience of them, though that was discouraging enough, he tells them (v. 29), I know that after my death you will utterly corrupt yourselves. Many a sad thought, no doubt, it occasioned to this good man, to foresee the apostasy and ruin of a people he had taken so much pains with, in order to them good and make them happy; but this was his comfort, that he had done his duty, and that God would be glorified, if not in their settlement, yet in their dispersion. Thus our Lord Jesus, a little before his death, foretold the rise of false Christs and false prophets (Mat 24:24), notwithstanding which, and all the apostasies of the latter times, we may be confident that the gates of hell shall not prevail against the church, for the foundation of God stands sure.

Tyndale Study Notes

On Deuteronomy 31:22

31:22 Moses wrote down the words: This statement is good evidence for the traditional view that Moses wrote Deuteronomy (see Deuteronomy Book Introduction, “Authorship”).

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