Genesis 17:15-19 And God said to Abraham, As to Sarai thy wife, thou shalt not call her name Sarai, but Sarah shall be her name.

Darby⁽ⁱ⁾ ¹⁵ And God said to Abraham, [As to] Sarai thy wife, thou shalt not call her name Sarai, but Sarah shall be her name. ¹⁶ And I will bless her, and I will give thee a son also of her; and I will bless her, and she shall become nations: kings of peoples shall be of her. ¹⁷ And Abraham fell on his face and laughed, and said in his heart, Shall [a child] be born to him that is a hundred years old? and shall Sarah, who is ninety years old, bear? ¹⁸ And Abraham said to God, Oh that Ishmael might live before thee! ¹⁹ And God said, Sarah thy wife shall indeed bear thee a son; and thou shalt call his name Isaac; and I will establish my covenant with him, for an everlasting covenant for his seed after him.