Genesis 17:8-10

New Revised Standard Version, Anglicised Catholic Edition

⁸ And I will give to you, and to your offspring after you, the land where you are now an alien, all the land of Canaan, for a perpetual holding; and I will be their God.’

⁹ God said to Abraham, ‘As for you, you shall keep my covenant, you and your offspring after you throughout their generations. ¹⁰ This is my covenant, which you shall keep, between me and you and your offspring after you: Every male among you shall be circumcised.