Deuteronomy 7:2-6

and when the Lord your God turns them over to you and you defeat them, you shall utterly destroy them. You shall not make a covenant with them nor be gracious to them.

Furthermore, you shall not intermarry with them: you shall not give your daughters to their sons, nor shall you take their daughters for your sons.

For they will turn your sons away from following Me, and they will serve other gods; then the anger of the Lord will be kindled against you and He will quickly destroy you.

But this is what you shall do to them: you shall tear down their altars, smash their memorial stones, cut their Asherim to pieces, and burn their carved images in the fire.

For you are a holy people to the Lord your God; the Lord your God has chosen you to be a people for His personal possession out of all the peoples who are on the face of the earth.