Genesis 17:13-15

New Revised Standard Version, Anglicised

¹³ Both the slave born in your house and the one bought with your money must be circumcised. So shall my covenant be in your flesh an everlasting covenant. ¹⁴ Any uncircumcised male who is not circumcised in the flesh of his foreskin shall be cut off from his people; he has broken my covenant.’

¹⁵ God said to Abraham, ‘As for Sarai your wife, you shall not call her Sarai, but Sarah shall be her name.