Deuteronomy 20:12-14

12And if it will not make peace with thee, but will make war with thee, then thou shalt besiege it;

13and when Jehovah thy 1God delivereth it into thy hand, thou shalt smite every male thereof with the edge of the sword:

14only the women, and the little ones, and the cattle, and all that shall be in the city, all the spoil thereof, shalt thou take as booty for thyself; and thou shalt eat the spoil of thine enemies, which Jehovah thy 2God giveth thee