Deuteronomy 7:2-4

Modern English Version

² and when the Lord your God delivers them before you and you strike them down, then you must utterly destroy them. You shall make no covenant with them nor show mercy to them. ³ What is more, you shall not intermarry with them. You shall not give your daughters to their sons or take their daughters for your sons. ⁴ For they will turn your sons away from following Me to serve other gods. Then the anger of the Lord will be inflamed against you, and He will quickly destroy you.