Genesis 17:15-19 And God said unto Abraham, As for Sarai your wife, you shall not call her name Sarai, but Sarah shall her name be.

KJ2000⁽ⁱ⁾ ¹⁵ And God said unto Abraham, As for Sarai your wife, you shall not call her name Sarai, but Sarah shall her name be. ¹⁶ And I will bless her, and give you a son also of her: yea, I will bless her, and she shall be a mother of nations; kings of people shall come from her. ¹⁷ Then Abraham fell upon his face, and laughed, and said in his heart, Shall a child be born unto him that is a hundred years old? and shall Sarah, that is ninety years old, bear? ¹⁸ And Abraham said unto God, O that Ishmael might live before you! ¹⁹ And God said, Sarah your wife shall bear you a son indeed; and you shall call his name Isaac: and I will establish my covenant with him for an everlasting covenant, and with his descendants after him.