Genesis 17:19-21

Amplified Bible, Classic Edition

¹⁹ But God said, Sarah your wife shall bear you a son indeed, and you shall call his name Isaac [laughter]; and I will establish My covenant or solemn pledge with him for an everlasting covenant and with his posterity after him.

²⁰ And as for Ishmael, I have heard and heeded you: behold, I will bless him and will make him fruitful and will multiply him exceedingly; He will be the father of twelve princes, and I will make him a great nation. [Fulfilled in Gen. 25:12-18.]

²¹ But My covenant, My promise and pledge, I will establish with Isaac, whom Sarah will bear to you at this season next year.