1 Corinthians 7:16-18
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.
18 Is any man called being circumcised? let him not become uncircumcised. Is any called in uncircumcision? let him not be circumcised.