Genesis 17:15-19

New International Version

¹⁵ God also said to Abraham, “As for Sarai^(A) your wife, you are no longer to call her Sarai; her name will be Sarah.^{(B) 16} I will bless her and will surely give you a son by her.^(C) I will bless her so that she will be the mother of nations;^(D) kings of peoples will come from her.”

¹⁷ Abraham fell facedown;^(E) he laughed^(F) and said to himself, “Will a son be born to a man a hundred years old?^(G) Will Sarah bear a child at the age of ninety?”^{(H) 18} And Abraham said to God, “If only Ishmael^(I) might live under your blessing!”^(J)

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