Numbers 31:8

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

Moses sent them, one thousand of every tribe, to the war with Phinehas the son of Eleazar the priest, to the war, with the vessels of the sanctuary and the trumpets for the alarm in his hand.

They fought against Midian, as the LORD commanded Moses. They killed every male.

The children of Israel took the women of Midian captive with their little ones; and all their livestock, all their flocks, and all their goods, they took as plunder.

All their cities in the places in which they lived, and all their encampments, they burned with fire.

They took all the captives, and all the plunder, both of man and of animal.