1 Corinthians 7:16-18

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

17 Regardless, each one should lead the life that the Lord has assigned to him and to which God has called him. This is what I prescribe in all the churches.

18 Was a man already circumcised when he was called? He should not become uncircumcised. Was a man still uncircumcised when called? He should not be circumcised.