Makes you wonder - are the three branches of Abrahamic faith intentional?
* Genesis 17:20-21 ESV “As for Ishmael, I have heard you; behold, I have blessed him and will make him fruitful and multiply him greatly. He shall father twelve princes, and I will make him into a great nation. But I will establish my covenant with Isaac, whom Sarah shall bear to you at this time next year.”” 
