1 Corinthians 7:15

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.

For what knowest thou, O wife, whether thou shalt save thy husband? or how knowest thou, O man, whether thou shalt save thy wife?

But as God hath distributed to every man, as the Lord hath called every one, so let him walk. And so ordain I in all churches.