I Corinthians 7:17-20

But as God has distributed to each one, as the Lord has called each one, so let him walk. And so I ordain in all the churches. Was anyone called while circumcised? Let him not become uncircumcised. Was anyone called while uncircumcised? Let him not be circumcised. Circumcision is nothing and uncircumcision is nothing, but keeping the commandments of God is what matters. Let each one remain in the same calling in which he was called.