Deuteronomy 20:14-16

American Standard Version

¹⁴ but the women, and the little ones, and the cattle, and all that is in the city, even all the spoil thereof, shalt thou take for a prey unto thyself; and thou shalt eat the spoil of thine enemies, which Jehovah thy God hath given thee. ¹⁵ Thus shalt thou do unto all the cities which are very far off from thee, which are not of the cities of these nations. ¹⁶ But of the cities of these peoples, that Jehovah thy God giveth thee for an inheritance, thou shalt save alive nothing that breatheth;