1 Corinthians 7:13-16

13And the woman who hath an husband that believeth not, and if he is pleased to dwell with her, let her not leave him. 14For 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. 15But if the unbelieving departeth, let him depart. A brother or a sister is not under bondage in such cases : but God hath called us to peace.1 16For how knowest thou, O wife, whether thou shalt save thy husband? or how knowest thou, O man, whether thou shalt save thy wife?2