Genesis 17:15-20

Isaac’s Birth Promised

15And God said to Abraham, “As for Sarai your wife, you shall not call her name Sarai, but Sarah
 Sarai and  Sarah mean princess
shall be her name.
16I will bless her, and moreover, I will bgive
Hebrew have given
you a son by her. I will bless her, and dshe shall become nations; kings of peoples shall come from her.”
17Then Abraham efell on his face fand laughed and said to himself, “Shall a child be born to a man who is a hundred years old? Shall Sarah, who is ninety years old, bear a child?” 18And Abraham said to God, “Oh that Ishmael might live before you!” 19God said, “No, but gSarah your wife shall bear you a son, and you shall call his name hIsaac.
 Isaac means he laughs
I will establish my covenant with him as an everlasting covenant for his offspring after him.
20As for Ishmael, I have heard you; behold, I have blessed him and will make him fruitful and jmultiply him greatly. He kshall father twelve princes, and lI will make him into a great nation.
Copyright information for ESV