Numbers 31:17 WBT

¹⁵  And Moses said to 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 the LORD, in the matter of Peor, and there was a plague among the congregation of the LORD.

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 female children, that have not known a man by lying with him, keep alive for yourselves.

¹⁹  And do ye abide without the camp seven days: whoever hath killed any person, and whoever hath touched any slain, purify [both] yourselves and your captives on the third day, and on the seventh day.