Great is the faith wherein Israel believed in Him who spoke and brought the world into being; for in reward for Israel's belief in the L–rd, the Shechinah reposed upon them and they chanted song (at the sea). As it is written "And they believed in the L–rd and in Moses His servant. Then Moses and the children of Israel sang, etc." And thus do you find that our father Abraham inherited this world and the world to come only in the merit of his believing in the L–rd. As it is written (in this connection, Genesis 15:6) "And he believed in the L–rd, and it was accounted unto him as tzedakah."