13. He 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.
14. And the male who is not circumcised, that soul shall be cut off from his people; he has broken My covenant.
15. And God said to Abraham, As for Sarai your wife, you shall not call her name Sarai; but Sarah [Princess] her name shall be.
16. And I will bless her and give you a son also by her. Yes, I will bless her, and she shall be a mother of nations; kings of peoples shall come from her.
17. Then Abraham fell on his face and laughed and said in his heart, Shall a child be born to a man who is a hundred years old? And shall Sarah, who is ninety years old, bear a son?
18. And [he] said to God, Oh, that Ishmael might live before You!
19. But God said, Sarah your wife shall bear you a son indeed, and you shall call his name Isaac [laughter]; and I will establish My covenant or solemn pledge with him for an everlasting covenant and with his posterity after him.
20. And as for Ishmael, I have heard and heeded you: behold, I will bless him and will make him fruitful and will multiply him exceedingly; He will be the father of twelve princes, and I will make him a great nation. [Fulfilled in Gen. 25:12-18.]
21. But My covenant, My promise and pledge, I will establish with Isaac, whom Sarah will bear to you at this season next year.