1 Corinthians 7:15-19

Yet if the unbelieving one is leaving, let him leave; the brother or the sister is not under bondage in such cases, but God has called us in peace.

For how do you know, wife, whether you will save your husband? Or how do you know, husband, whether you will save your wife?

Only, as the Lord has assigned to each one, as God has called each, in this way let him walk. And so I direct in all the churches.

Was any man called when he was already circumcised? He is not to become uncircumcised. Has anyone been called in uncircumcision? He is not to be circumcised.

Circumcision is nothing, and uncircumcision is nothing, but what matters is the keeping of the commandments of God.