¹⁵ God said to Abraham, “As for your wife Sarai, do not call her Sarai, for Sarah^[a] will be her name. ¹⁶ I will bless her; indeed, I will give you a son by her.^(A) I will bless her, and she will produce nations; kings of peoples will come from her.”

¹⁷ Abraham fell facedown. Then he laughed^(B) and said to himself, “Can a child be born to a hundred-year-old man? Can Sarah, a ninety-year-old woman, give birth?” ¹⁸ So Abraham said to God, “If only Ishmael were acceptable to You!”^[b]

¹⁹ But God said, “No. Your wife Sarah will bear you a son, and you will name him Isaac.^[c] I will confirm My covenant with him as an everlasting covenant for his future offspring. ²⁰ As for Ishmael, I have heard you. I will certainly bless him; I will make him fruitful and will multiply him greatly. He will father 12 tribal leaders,^(C) and I will make him into a great nation. ²¹ But I will confirm My covenant with Isaac, whom Sarah will bear to you at this time next year.”^(D)

The Birth of Isaac

21 The Lord came to Sarah as He had said, and the Lord did for Sarah what He had promised.^{(A) 2} Sarah became pregnant and bore a son to Abraham in his old age, at the appointed time God had told him.^{(B) 3} Abraham named his son who was born to him—the one Sarah bore to him—Isaac.^{(C) 4} When his son Isaac was eight days old, Abraham circumcised him, as God had commanded him.^{(D) 5} Abraham was 100 years old when his son Isaac was born to him.^(E)

⁶ Sarah said, “God has made me laugh, and everyone who hears will laugh with me.”^[a](F)