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.

¹⁶ The promises were spoken to Abraham and to his seed.^(A) Scripture does not say “and to seeds,” meaning many people, but “and to your seed,”^[a](B) meaning one person, who is Christ.