Numbers 31:17 ASV

¹⁵  And Moses said unto them, Have ye saved all the women alive?

¹⁶  Behold, these caused the children of Israel, through the counsel of Balaam, to commit trespass against Jehovah in the matter of Peor, and so the plague was among the congregation of Jehovah.

¹⁷  Now therefore kill every male among the little ones, and kill every woman that hath known man by lying with him.

¹⁸  But all the women-children, that have not known man by lying with him, keep alive for yourselves.

¹⁹  And encamp ye without the camp seven days: whosoever hath killed any person, and whosoever hath touched any slain, purify yourselves on the third day and on the seventh day, ye and your captives.