score:9
2 Corinthians 6:14-18 is generally cited in such cases:
Do not be bound together with unbelievers; for what partnership have righteousness and lawlessness, or what fellowship has light with darkness? Or what harmony has Christ with Belial, or what has a believer in common with an unbeliever? Or what agreement has the temple of God with idols? For we are the temple of the living God; just as God said,
"I WILL DWELL IN THEM AND WALK AMONG THEM;
AND I WILL BE THEIR GOD, AND THEY SHALL BE MY PEOPLE.
"Therefore, COME OUT FROM THEIR MIDST AND BE SEPARATE," says the Lord.
"AND DO NOT TOUCH WHAT IS UNCLEAN;
And I will welcome you.
"And I will be a father to you,
And you shall be sons and daughters to Me,"
Says the Lord Almighty.
If one member of an "interfaith" marriage were to be saved after getting married, then it would be that spouse's duty to continue to witness to their unbelieving mate:
that if any brother has a wife who is an unbeliever, and she consents to live with him, he must not divorce her. And a woman who has an unbelieving husband, and he consents to live with her, she must not send her husband away. For the unbelieving husband is sanctified through his wife, and the unbelieving wife is sanctified through her believing husband; for otherwise your children are unclean, but now they are holy. Yet if the unbelieving one leaves, let him leave; the brother or the sister is not under bondage in such cases, but God has called us to peace. For how do you know, O wife, whether you will save your husband? Or how do you know, O husband, whether you will save your wife?
Upvote:12
A verse which is used widely is 1 Corinthians 7:39
A woman is bound to her husband as long as he lives. But if her husband dies, she is free to marry anyone she wishes, but he must belong to the Lord.
This verse talks for a woman who wish to get married again but the principle is the same for anyone. "Belong to the Lord" means to be a Christian.
Upvote:19
2 Corinthians 6:14-15 is often understood to prohibit the marriage of Christians with non-Christians:
Do not be yoked together with unbelievers. For what do righteousness and wickedness have in common? Or what fellowship can light have with darkness? What harmony is there between Christ and Belial? Or what does a believer have in common with an unbeliever?