Having searched his list of the gods of the nations in vain for a mention of the God of the Hebrews, Pharaoh cited before him the wise men of Egypt, and he said to them: "Have ye ever heard the name of the God of these people?" They replied, "We have been told that He is a son of the wise, the son of ancient kings." Then spake God, saying, "O ye fools! Ye call yourselves wise men, but Me ye call only the son of the wise. Verily, I will set at naught all your wisdom and your understanding."[160] Pharaoh persisted in his obduracy, even after Moses and Aaron had performed the miracle of the rod. At the time when the two Hebrews succeeded in entering the palace, guarded as it was by lions, Pharaoh had sent for his magicians, at their head Balaam and his two sons Jannes and Jambres, and when they appeared before him, he told them of the extraordinary incident, how the lions had followed the two old men like dogs, and fawned upon them. It was Balaam's opinion that they were simply magicians like himself and his companions, and he prayed the king to have them come before him together with themselves, to test who were the master magicians, the Egyptians or the Hebrews. Pharaoh called for Moses and Aaron, and he said to them: "Who will believe you when you say that you are the ambassadors of God, as you pretend to be, if you do not convince men by performing wonders?" Thereupon Aaron cast his rod to the ground, and it became a serpent.[161] Pharaoh laughed aloud. "What," he exclaimed, "is this all your God can do? It is the way of merchants to carry merchandise to a place if there is none of it there, but would anyone take brine to Spain or fish to Accho? It seems you do not know that I am an adept in all sorts of magic!" He ordered little school children to be brought, and they repeated the wonder done by Moses and Aaron; indeed, Pharaoh's own wife performed it. Jannes and Jambres, the sons of Balaam, derided Moses, saying, "Ye carry straw to Ephrain!"[162] whereto Moses answered, "To the place of many vegetables, thither carry vegetables."