It is said that Abraham predicted via astrological tablets that he would have no second son, but God said to him, "Away with your astrology; for Israel there is no "mazal"!" The birth of his second son, the patriarch Isaac, then disproves the idea that astrology applies to Israel. Genesis Rabbah states that Abraham was not an astrologer, but rather a prophet, inasmuch as only those beneath the stars could be subject to their influence; but that Abraham was above them.