A parable: Once there was a king who sought to build a palace. He began to dig, going further down, to lay a foundation, but he found only swampy soil. And so it was in many places. He was not able to build until he dug in one place, and there he found a bed of rock. Thus he said, “I am building and placing foundations here,” and he built. So too, the Holy One, blessed be He, sought to create the world. He was sitting and scrutinizing the generation of Enosh and the generation of the flood, and He said, “For what shall I create the world and let those wicked men arise and vex me?” But when the Holy One, blessed be He, saw Abraham arise in the future, he said, “Behold, I have found the rock (petra) to build upon and to lay the foundation of the world.” Thus he called Abraham “Rock,”⁠a as it says in Isaiah, “Look to the rock from which you were hewn,” and he called Israel “rocks.”