Deuteronomy 7:2-4 ▼

2 and when the LORD thy God shall deliver them up before thee, and thou shalt smite them; then thou shalt utterly destroy them; thou shalt make no covenant with them, nor show mercy unto them;

3 neither shalt thou make marriages with them: thy daughter thou shalt not give unto his son, nor his daughter shalt thou take unto thy son.

4 For he will turn away thy son from following Me, that they may serve other gods; so will the anger of the LORD be kindled against you, and He will destroy thee quickly.