¹⁹ Then God said, “Yes, but your wife Sarah will bear you a son,^(A) and you will call him Isaac.^[a](B) I will establish my covenant with him^(C) as an everlasting covenant^(D) for his descendants after him.

⁹ For this was how the promise was stated: “At the appointed time I will return, and Sarah will have a son.”^[a](A)

²³ His son by the slave woman was born according to the flesh,^(A) but his son by the free woman was born as the result of a divine promise.^(B)