God said, *No, but Sarah, your wife, will bear you a son. You shall call his name Yitzchak. I will establish my covenant with him for an everlasting covenant for his seed after him.
He said, *I will certainly return to you when the season comes round. Behold, Sarah your wife will have a son.* Sarah heard in the tent door, which was behind him.
He gave him the covenant of circumcision. So Avraham became the father of Yitzchak, and circumcised him the eighth day. Yitzchak became the father of Ya`akov, and Ya`akov became the father of the twelve patriarchs.