Numbers 31:16

13 And Moses, and Eleazar the priest, and all the princes of the company, go out to meet them, unto the outside of the camp,

14 and Moses is wroth against the inspectors of the force, chiefs of the thousands, and chiefs of the hundreds, who are coming in from the host of the battle.

15 And Moses saith unto them, `Have ye kept alive every female?

16 lo, they -- they have been to the sons of Israel, through the word of Balaam, to cause a trespass against Jehovah in the matter of Peor, and the plague is in the company of Jehovah.

17 `And now, slay ye every male among the infants, yea, every woman known of man by the lying of a male ye have slain;

18 and all the infants among the women, who have not known the lying of a male, ye have kept alive for yourselves.

19 `And ye, encamp ye at the outside of the camp seven days -- any who hath slain a person, and any who hath come against a pierced one, ye cleanse yourselves on the third day, and on the seventh day -- ye and your captives;