Deuteronomy 20:16-18

New International Version

¹⁶ However, in the cities of the nations the Lord your God is giving you as an inheritance, do not leave alive anything that breathes.^{(A) 17} Completely destroy^[a] them—the Hittites, Amorites, Canaanites, Perizzites, Hivites and Jebusites—as the Lord your God has commanded you. ¹⁸ Otherwise, they will teach you to follow all the detestable things they do in worshiping their gods,^(B) and you will sin^(C) against the Lord your God.