Here he asks Arjasp, to whom he is unknown, for permission to give a feast to the principal men on the turrets of the citadel. When the wine has done its work, Isfendyar gives the signal of fire already agreed upon to his followers; the garrison is overpowered; Arjasp is slain by Isfendyar in single combat, and Isfendyar returns victorious with his sisters to Balkh. Here a new and yet more dangerous task awaits him. Rustem, who made Kai Kobad ruler of Iran, and has since done such good service, and achieved such noble acts for Kai Kaus and Kai Chosru, remains at a distance from the court and army of king Gushtasp. He despises the doctrine of Zartusht. At Gushtasp's bidding Isfendyar must break down this opposition, and bring him to the king. Isfendyar marches out and commands Rustem to follow him in chains to the court. With a heavy heart Rustem seeks to withdraw from the contest; he treats with Isfendyar; but the latter obstinately insists on his terms. Nothing remains for the aged hero but to give battle against his will. Isfendyar's invulnerable body resists his blows, and Reksh, the horse of Rustem, is wounded; Rustem is himself wounded and compelled to retire. He has no hope of conquering in the battle which is to begin again on the next day. In his deep distress he calls to the bird Simurgh, who comes, sucks the blood from his wound, and heals the horse. Simurgh is acquainted with the future, and advises a compromise: there is indeed a way of overcoming Isfendyar, but anyone who takes his life "must not expect salvation in this world or the next." Rustem cannot bring himself to suffer defeat in the battle, and therefore in the night Simurgh carries him away to the tree of life, on the sea of China, and bids him break off the branch to which Isfendyar's life is bound. Out of this branch is cut the death-arrow for the conflict of the morrow. With it Rustem hits the place in the eye in which alone Isfendyar is vulnerable. But for Rustem also the lot of death is cast. He is invited by the king of Cabul, a tributary prince, to hunt; and the king's son-in-law, Sheghad, prepares a pit filled with swords and lances, for the destruction of the aged hero. Into this Rustem falls with his horse, but even in the moment of death his arrow hits Sheghad, who had concealed himself in a hollow tree, in order to watch the success of his scheme. Rustem's son Feramorz avenges the murder of his father on the king of Cabul; but Gushtasp renounces the world, and transfers the government to his grandson Bahman, the son of Isfendyar.