And 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 descendants after him.
And he said, I will certainly return unto you according to the time of life; and, lo, Sarah your wife shall have a son. And Sarah heard it in the tent door, which was behind him.
And he gave him the covenant of circumcision: and so Abraham begat Isaac, and circumcised him the eighth day; and Isaac begat Jacob; and Jacob begat the twelve patriarchs.
Through faith also Sara herself received strength to conceive, and was delivered of a child when she was past age, because she judged him faithful who had promised.
And I took your father Abraham from the other side of the river, and led him throughout all the land of Canaan, and multiplied his descendants, and gave him Isaac.