Deuteronomy 7:2-4

Evangelical Heritage Version

² and when the Lord your God has given them over to you and he has struck them down, you are to devote them to destruction. Do not make a treaty with them, and do not show mercy to them. ³ Do not form marriage alliances with them. Do not give your daughters to their sons, and do not take their daughters for your sons, ⁴ because they will turn your sons away from following me, and they will serve other gods. The anger of the Lord will burn against you, and then he will destroy you quickly.