Numbers 31:3 in the King James Version
And Moses spake unto the people, saying, Arm some of yourselves unto the war, and let them go against the Midianites, and avenge the LORD of Midian.
Context
2 “Avenge the children of Israel on the Midianites. Afterward you shall be gathered to your people.”
3 Moses spoke to the people, saying, “Arm men from among you for war, that they may go against Midian, to execute the LORD’s vengeance on Midian.
4 You shall send one thousand out of every tribe, throughout all the tribes of Israel, to the war.”