John Gill

On Numbers 31:1

And the Lord spake unto Moses,.... After the plague upon Israel for their fornication and idolatry, into which they were drawn by the daughters of Moab and Midian, and after the sum of the people was taken in the plains of Moab, and various laws given or repeated, and a little before the death of Moses:

saying; as follows.

Keil & Delitzsch

On Numbers 31:1-2

The Campaign. - After the people of Israel had been mustered as the army of Jehovah, and their future relation to the Lord had been firmly established by the order of sacrifice that was given to them immediately afterwards, the Lord commanded Moses to carry out that hostility to the Midianites which had already been commanded in Num 25:16-18. Moses was to revenge (i.e., to execute) the revenge of the children of Israel upon the Midianites, and then to be gathered to his people, i.e., to die, as had already been revealed to him (Num 27:13). "The revenge of the children of Israel" was revenge for the wickedness which the tribes of the Midianites who dwelt on the east of Moab (see at Num 22:4) had practised upon the Israelites, by seducing them to the idolatrous worship of Baal Peor. This revenge is called the "revenge of Jehovah" in Num 31:3, because the seduction had violated the divinity and honour of Jehovah. The daughters of Moab had also taken part in the seduction (Num 25:1-2); but they had done so at the instigation of the Midianites, and not of their own accord, and therefore the Midianites only were to atone for the wickedness.

Matthew Henry's Commentary

All who, without commission from God, dare to execute private revenge, and who, from ambition, covetousness, or resentment, wage war and desolate kingdoms, must one day answer for it. But if God, instead of sending an earthquake, a pestilence, or a famine, be pleased to authorize and command any people to avenge his cause, such a commission surely is just and right. The Israelites could show such a commission, though no persons now can do so. Their wars were begun and carried on
expressly by Divine direction, and they were enabled to conquer by miracles. Unless it can be proved that the wicked Canaanites did not deserve their doom, objectors only prove their dislike to God, and their love to his enemies. Man makes light of the evil of sin, but God abhors it. This explains the terrible executions of the nations which had filled the measure of their sins.

Tyndale Study Notes

On Numbers 31:1-2

31:1-2 The Lord ordered Moses to lead Israel in a war of retaliation against the Midianites, who had joined the Moabites in leading the Hebrews into idolatry (ch 25). The Midianites were a tribal people who inhabited the arid and semiarid regions south and east of Palestine and east of the Jordan River; they were counted among the “people of the east” (Judg 6:3, 33; 7:12). They lived in camps or settlements and were famous for their knowledge of desert transportation (cp. Gen 37:28, 36; Isa 60:6). While they were descended from Abraham (Gen 25:1-2) and had been friendly toward Moses (Exod 2:15-3:1; cp. Num 10:29), the elders of Midian had joined Balak in hiring Balaam to curse Israel (22:4, 7), whose presence threatened the peoples of Transjordan (the region east of the Jordan).

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