Deuteronomy 7:3-4 NIV

3 Do not intermarry with them.1 Do not give your daughters to their sons or take their daughters for your sons,

References for Deuteronomy 7:3

4 for they will turn your sons away from following me to serve other gods,2 and the LORD's anger will burn against you and will quickly destroy3 you.

References for Deuteronomy 7:4