1 Corinthians 7:12-16Young's Literal Translation (YLT)
12 And to the rest I speak -- not the Lord -- if any brother hath a wife unbelieving, and she is pleased to dwell with him, let him not send her away;
13 and a woman who hath a husband unbelieving, and he is pleased to dwell with her, let her not send him away;
14 for the unbelieving husband hath been sanctified in the wife, and the unbelieving wife hath been sanctified in the husband; otherwise your children are unclean, but now they are holy.
15 And, if the unbelieving doth separate himself -- let him separate himself: the brother or the sister is not under servitude in such [cases], and in peace hath God called us;
16 for what, hast thou known, O wife, whether the husband thou shalt save? or what, hast thou known, O husband, whether the wife thou shalt save?