It's a covenant. It's a deal. And Abraham is tested. There's the story of his son. Remember, he had two sons to begin with, and that's Ishmael and Isaac. Now, Ishmael, who is the son of Hagar, who is Abraham's slave, is going to be the descendant of the people that are going to form Islam. And of course, Isaac is going to be the descendant that continues with this covenant and eventually into Israel.