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.

¹¹ Abraham and Sarah were already very old,^(A) and Sarah was past the age of childbearing.^{(B) 12} So Sarah laughed^(C) to herself as she thought, “After I am worn out and my lord^(D) is old, will I now have this pleasure?”

¹³ Then the Lord said to Abraham, “Why did Sarah laugh and say, ‘Will I really have a child, now that I am old?’^{(E) 14} Is anything too hard for the Lord?^(F) I will return to you at the appointed time next year,^(G) and Sarah will have a son.”^(H)

The Birth of Isaac

21 Now the Lord was gracious to Sarah^(A) as he had said, and the Lord did for Sarah what he had promised.^(B)

² Sarah became pregnant and bore a son^(A) to Abraham in his old age,^(B) at the very time God had promised him.^(C)