1 Corinthians 7:15-20

15But if the unbelieving partner leaves, let him leave. In such cases the [remaining] brother or sister is not [spiritually or morally] bound. But God has called us to peace.

16For how do you know, wife, whether you will save your husband [by leading him to Christ]? Or how do you know, husband, whether you will save your wife [by leading her to Christ]?

17Only, let each one live the life which the Lord has assigned him, and to which God has called him [for each person is unique and is accountable for his choices and conduct, let him walk in this way]. This is the rule I make in all the churches.

18Was anyone at the time of his calling [from God already] circumcised? He is not to become uncircumcised. Has anyone been called while uncircumcised? He is not to be circumcised.

19Circumcision is nothing, and uncircumcision is nothing, but what matters is keeping the commandments of God.

20Each one should remain in the condition in which he was [when he was] called.