"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 all more powerful 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.
References for Deuteronomy 7:2
Do not intermarry with them, and don't let your daughters and sons marry their sons and daughters.
They will lead your young people away from me to worship other gods. Then the anger of the LORD will burn against you, and he will destroy you.
Instead, you must break down their pagan altars and shatter their sacred pillars. Cut down their Asherah poles and burn their idols.
For you are a holy people, who belong to the LORD your God. Of all the people on earth, the LORD your God has chosen you to be his own special treasure.