1 Corinthians 7:14-16

Young's Literal Translation

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?