By faith even Sarah herself received power for conception of seed, and she gave birth beyond the time of age, because she considered him faithful who promised.
And he gave him the covenant of circumcision. And so he begot Isaac, and circumcised him the eighth day. And Isaac begot Jacob, and Jacob the twelve patriarchs.
And he said, I will certainly return to thee when the season comes round, and, lo, Sarah thy wife shall have a son. And Sarah heard in the tent door, which was behind him.
And God said, No, but Sarah thy wife shall bear thee a son, and thou shall call his name Isaac. And I will establish my covenant with him for an everlasting covenant for his seed after him.