Numbers 31:5

5 So 1,000 were recruited from each Israelite tribe out of the thousands[a] in Israel-12,000 equipped for war.

Numbers 31:5 Meaning and Commentary

Numbers 31:5

So they were delivered out of the thousands of Israel
] Several thousands very probably offered themselves voluntarily to go to the war, or however were summoned together on this account, and out of them the following number was delivered of picked and chosen men:

a thousand [of every] tribe, twelve thousand armed for war;
which was but a small number to go against so considerable a nation and people; but this was done to show that the war was of the Lord, he would fight the battle, and give them victory, it being the same to him to do it with few as with many; and to encourage the people of Israel to believe the Lord would give them success against their many and powerful enemies in the land of Canaan, on the borders of which they now were.

Numbers 31:5 In-Context

3 So Moses spoke to the people, "Equip some of your men for war. They will go against Midian to inflict the Lord's vengeance on them.
4 Send 1,000 men to war from each Israelite tribe."
5 So 1,000 were recruited from each Israelite tribe out of the thousands in Israel-12,000 equipped for war.
6 Moses sent 1,000 from each tribe to war. They went with Phinehas son of Eleazar the priest, in whose care were the holy objects and signal trumpets.
7 They waged war against Midian, as the Lord had commanded Moses, and killed every male.

Footnotes 1

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