13He who comes to birth in your house and he who is made yours for a price, all are to undergo circumcision; so that my agreement may be marked in your flesh, an agreement for all time.
14And any male who does not undergo circumcision will be cut off from his people: my agreement has been broken by him.
15And God said, As for Sarai, your wife, from now her name will be not Sarai, but Sarah.
16And I will give her a blessing so that you will have a son by her: truly my blessing will be on her, and she will be the mother of nations: kings of peoples will be her offspring.
17Then Abraham went down on his face, and laughing, said in his heart, May a man a hundred years old have a child? will Sarah, at ninety years old, give birth?
18And Abraham said to God, If only Ishmael's life might be your care!
19And God said, Not so; but Sarah, your wife, will have a son, and you will give him the name Isaac, and I will make my agreement with him for ever and with his seed after him.
