"But of the cities of these peoples which the LORD your God gives you as an inheritance, you shall let nothing that breathes remain alive,
Deuteronomy 20:16
Surrounding context
20:15 Thus you shall do to all the cities which are very far from you, which are not of the cities of these nations.
20:16 "But of the cities of these peoples which the LORD your God gives you as an inheritance, you shall let nothing that breathes remain alive,
20:17 but you shall utterly destroy them: the Hittite and the Amorite and the Canaanite and the Perizzite and the Hivite and the Jebusite, just as the LORD your God has commanded you,