1 Corinthians 7:16
King James Version
“For what knowest thou, O wife, whether thou shalt save husband? or how knowest thou, O man, whether thou shalt save wife?”
Context
13And the woman which hath an husband that believeth not, and if he be 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 depart, let him depart. A brother or a sister is not under bondage in such but God hath called us to peace.
16For what knowest thou, O wife, whether thou shalt save husband? or how knowest thou, O man, whether thou shalt save wife?
17But 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.
18Is any man called being circumcised? let him not become uncircumcised. Is any called in uncircumcision? let him not be circumcised.
19Circumcision is nothing, and uncircumcision is nothing, but the keeping of the commandments of God.