Deuteronomy 20:16-18

JPS_ASV_Byz(i) 16 Howbeit of the cities of these peoples, that the LORD thy God giveth thee for an inheritance, thou shalt save alive nothing that breatheth, 17 but thou shalt utterly destroy them: the Hittite, and the Amorite, the Canaanite, and the Perizzite, the Hivite, and the Jebusite; as the LORD thy God hath commanded thee; 18 that they teach you not to do after all their abominations, which they have done unto their gods, and so ye sin against the LORD your God.