Numbers 31:7-17

7They fought Midian just as Adonai had commanded Moses, and killed every male.

8Among the slain they also killed the Midianite kings: Evi, Rekem, Zur, Hur and Reba, the five kings of Midian. They also killed Balaam son of Beor with the sword.

9Bnei-Yisrael also captured women and sons of Midian, along with all their herds and flocks, and plundered all their goods.

10They burned with fire all the Midianite cities, settlements, as well as all their camps.

11They seized all the plunder and all the spoil, both people and animals.

12They brought the captives, plunder and spoils to Moses, Eleazar the kohen and to the assembly of Bnei-Yisrael at their camp on the plains of Moab, by the Jordan at Jericho.

13Moses, Eleazar the kohen, and all the princes of the community went to meet them outside the camp.

14But Moses was angry with the officers of the army—the commanders of thousands, the commanders of hundreds, those returning from the campaign of the war.

15Moses said to them, “You let all the women live?

16Why, they are the ones—because of Balaam’s advice—who caused Bnei-Yisrael to be unfaithful to Adonai in the matter of Peor, so that the plague was on the community of Adonai!

17So now, kill all the boys and kill every woman who has been intimate with a man.