Bible Verses About Miscegenation (Intermarriage): Reasons for prohibition

Neither shalt thou take of their daughters a wife for thy son, lest after they themselves have committed fornication, they make thy sons also to commit fornication with their gods.

For she will turn away thy son from following me, that he may rather serve strange gods, and the wrath of the Lord will be kindled, and will quickly destroy thee.

But if you will embrace the errors of these nations that dwell among you, and make marriages with them, and join friendships:

Know ye for a certainty that the Lord your God will not destroy them before your face, but they shall be a pit and a snare in your way, and a stumbling-block at your side, and stakes in your eyes, till he take you away and destroy you from off this excellent land, which he hath given you.