Here are 8 Bible verses about mixed marriages from the Old and New Testaments of the Holy Bible (King James Version), sorted from most to least relevant.
2 Corinthians 6:14 KJV
Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness?
Deuteronomy 7:3-4 KJV
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. For they 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 destroy thee suddenly.
Galatians 3:28 KJV
There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for ye are all one in Christ Jesus.
Hebrews 13:4 KJV
Marriage is honourable in all, and the bed undefiled: but whoremongers and adulterers God will judge.
1 Corinthians 7:12-16 KJV
But to the rest speak I, not the Lord: If any brother hath a wife that believeth not, and she be pleased to dwell with him, let him not put her away. And the woman which hath an husband that believeth not, and if he be pleased to dwell with her, let her not leave him. For the unbelieving husband is sanctified by the wife, and the unbelieving wife is sanctified by the husband: else were your children unclean; but now are they holy. But if the unbelieving depart, let him depart. A brother or a sister is not under bondage in such cases: but God hath called us to peace. For what knowest thou, O wife, whether thou shalt save thy husband? or how knowest thou, O man, whether thou shalt save thy wife?
1 Corinthians 7:39 KJV
The wife is bound by the law as long as her husband liveth; but if her husband be dead, she is at liberty to be married to whom she will; only in the Lord.
Acts 17:26 KJV
And hath made of one blood all nations of men for to dwell on all the face of the earth, and hath determined the times before appointed, and the bounds of their habitation;
Acts 10:34 KJV
Then Peter opened his mouth, and said, Of a truth I perceive that God is no respecter of persons: