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. But in terms of testing the covenant, God actually, in the Old Testament, asks Abraham to kill his son Isaac. You got to kill your son Isaac to show how much you're going to listen to me. And right before he kills him, God's like, psych!