And he gave him the covenant of circumcision. And so Abraham became the father of Isaac, and circumcised him on the eighth day, and Isaac became the father of Jacob, and Jacob of the twelve patriarchs.
The LORD said, "I will surely return to you about this time next year, and Sarah your wife shall have a son." And Sarah was listening at the tent door behind him.
God said, "No, but Sarah your wife shall bear you a son, and you shall call his name Isaac.[6] I will establish my covenant with him as an everlasting covenant for his offspring after him.