Numbers 31:5-7

King James Version

⁵ So there were delivered out of the thousands of Israel, a thousand of every tribe, twelve thousand armed for war.

⁶ And Moses sent them to the war, a thousand of every tribe, them and Phinehas the son of Eleazar the priest, to the war, with the holy instruments, and the trumpets to blow in his hand.

⁷ And they warred against the Midianites, as the Lord commanded Moses; and they slew all the males.