9And God further said to Abraham, “You shall therefore keep My covenant, you, and your descendants after you in their generations. 10This is My covenant, which you shall keep, between Me and you and your descendants after you: Every boy among you shall be circumcised. 11And you shall circumcise the flesh of your foreskin; and it shall be a sign of the covenant between Me and you. 12And when baby boys are eight days old, they shall be circumcised among you, every male child in your generations, he that is born in the house, or bought with money of any stranger, who is not of your flesh and blood. 13He that is born in your house, and he that is bought with your money, must be circumcised: and My covenant shall be in your flesh for an everlasting covenant. 14And the uncircumcised male child whose flesh of his foreskin is not circumcised, that soul shall be cut off from his people; he has broken My covenant.”

15And God said to Abraham, “As for Sarai, your wife, you shall not call her Sarai, but Sarah shall her name be. 16And I will bless her, and also give you a son by her: yea, I will bless her, and she shall be a mother of nations; kings of people shall be from her.” 17Then Abraham fell upon his face, and laughed, and said in his heart, “Shall a child be born to a man that is a hundred years old? And shall Sarah, who is ninety years old, bear children?” 18And Abraham said to God, “O that Ishmael might live before You!” 19And God said, “Sarah, your wife, shall bear you a son indeed; and you shall call his name Isaac: and I will establish My covenant with him for an everlasting covenant, and with his seed after him. 20And as for Ishmael, I have heard you: Behold, I have blessed him, and will make him fruitful, and will multiply him exceedingly; twelve princes shall he beget, and I will make of him a great nation. 21But My covenant I will establish with Isaac, whom Sarah shall bear to you at this set time in the next year.” 22And He ceased talking with Abraham, and God went up from him.

23And Abraham took Ishmael, his son, and all that were born in his house, and all that were bought with his money, every male among the men of Abraham's household; and circumcised the flesh of their foreskin on the very same day, as God had said to him. 24And Abraham was ninety-nine years old when he was circumcised in the flesh of his foreskin. 25And Ishmael, his son, was thirteen years old when he was circumcised in the flesh of his foreskin. 26In the very same day was Abraham and Ishmael, his son, circumcised. 27And all the men of his house, born in the house, and bought with money from foreigners, were circumcised with him.