Deuteronomy 7:1-4

“When the LORD your God brings you into the land you are about to enter and occupy, he will clear away many nations ahead of you: the Hittites, Girgashites, Amorites, Canaanites, Perizzites, Hivites, and Jebusites. These seven nations are greater and more numerous than you. When the LORD your God hands these nations over to you and you conquer them, you must completely destroy them. Make no treaties with them and show them no mercy. You must not intermarry with them. Do not let your daughters and sons marry their sons and daughters, for they will lead your children away from me to worship other gods. Then the anger of the LORD will burn against you, and he will quickly destroy you.