Were delivered - Or, "were told off."

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.

So there were delivered out of the thousands of Israel, a thousand of every tribe, twelve thousand armed for war.

31:5 Twelve thousand - God would send no more, though it is apparent the Midianites were numerous and strong, because he would exercise their trust in him, and give them an earnest of their Canaanitish conquests.

5. there were delivered-that is, drafted, chosen, an equal amount from each tribe, to prevent the outbreak of mutual jealousy or strife. Considering the numerical force of the enemy, this was a small quota to furnish. But the design was to exercise their faith and animate them to the approaching invasion of Canaan.

31:1-6 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.