Deuteronomy 7:1-2

1When the Lord your God brings you to the land that you are going to occupy and forces out many nations before you – Hittites, Girgashites, Amorites, Canaanites, Perizzites, Hivites, and Jebusites, seven nations more numerous and powerful than you –

2and he delivers them over to you and you attack them, you must utterly annihilate them. Make no treaty with them and show them no mercy!