1 Corinthians 7:16 in the World English Bible
For how do you know, wife, whether you will save your husband? Or how do you know, husband, whether you will save your wife?
Context
15 But if the unbelieving depart, let him depart. A brother or a sister is not under bondage in such cases: but God hath called us to peace.
16 For what knowest thou, O wife, whether thou shalt save thy husband? or how knowest thou, O man, whether thou shalt save thy wife?
17 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.