Deuteronomy 7:2-4

2and Adonai your God gives them over to you and you strike them down, then you are to utterly destroy them. You are to make no covenant with them and show no mercy to them.

3You are not to intermarry with them—you are not to give your daughter to his son, or take his daughter for your son.

4For he will turn your son away from following Me to serve other gods. Then the anger of Adonai will be kindled against you, and He will swiftly destroy you.