Now when Rustem was come nigh unto the tents of Arzang, that led the army of Mazinderan, he uttered a cry that rent the mountains. And the cry brought forth Arzang from out his tent, and when he perceived Rustem he ran at him, and would have thrown him down. But Rustem sprang upon Arzang, and he seemed an insect in his grasp. And he overcame him, and parted his head from his body, and hung it upon his saddlebow in triumph. And fear came upon the army of Mazinderan when they saw it, and they fled in faintness of spirit, and so great was the confusion that none beheld whither he bent his steps. And fathers fell upon sons, and brothers upon brothers, and dismay was spread throughout the land.
Then Rustem loosened the bonds of Aulad, and bade him lead him into the city where Kai Kaous pined in his bondage. And Aulad led him.
Now when they neared the city, Rakush neighed so loud that the sound pierced even unto the spot where Kai Kaous was hidden. And the Shah, when he heard it, rejoiced, for he knew that succour was come. And he told it unto his comrades. But they refused to listen unto these words, and deemed that grief had distraught his wits. In vain therefore did Kai Kaous insist unto them that his ears had heard the voice of Rakush. But not long did he combat their unbelief, for presently there came before him Tehemten, the stout of limb, and when the nobles heard his voice and his step they repented them of their doubts. And Kai Kaous embraced Rustem and blessed him, and questioned him of his journey and of Zal. Then he said-"O my Pehliva, we may no longer waste the moments with sweet words.
I must send thee forth yet again to battle. For when the White Deev shall learn that Arzang is defeated, he will come forth from out his mountain fastness, and bring with him the whole multitude of evil ones, and even thy might will not stand before them. Go therefore unto the Seven Mountains, and conquer the White Deev ere the tidings reach him of thy coming. Unto thee alone can Iran look for her succour, for I cannot aid thee, neither can my warriors assist thee with their arms, for our eyes are filled with darkness, and their light is gone out. Yet I grieve to send thee into this emprise alone, for I have heard it spoken that the dwelling of the Deevs is a spot of fear and terror, but alas! my grief is of no avail. And I conjure thee, slay the Deev, and bring unto me the blood of his heart, for a Mubid hath revealed unto me that only by this blood can our sight be restored.
And go forth now, my son, and may Ormuzd be gracious unto thee, and may the tree of gladness sprout again for Iran!
Then Rustem did as Kai Kaous commanded, and he rode forth, and Aulad went beside him to lead him in the way. And when they had passed the Seven Mountains and were come unto the gates of hell, Rustem spake unto Aulad, and said-"Thou hast ever led me aright, and all that thou hast spoken I have surely found it true. Tell me, therefore, now how I shall vanquish the Deevs."
And Aulad said, "Tarry, I counsel thee, till that the sun be high in the heavens. For when it beateth fierce upon the earth the Deevs are wont to lay them down to slumber, and when they are drunk with sleep they shall fall an easy prey into thine hands."
Then Rustem did as Aulad bade him, and he halted by the roadside, and he bound Aulad from head to foot in his snare, and he seated himself upon the ends. But when the sun was high he drew forth his sword from out its sheath, and shouted loud his name, and flung it among the Deevs like to a thunderbolt. Then before they were well awakened from their sleep, he threw himself upon them, and none could resist him, and he scattered their heads with his sword. And when he had dispersed the guards he came unto the lair of the White Deev.
Then Rustem stepped within the rocky tomb wherein the Deev was hidden, and the air was murky and heavy with evil odours, and the Pehliva could not see his path. But he went on void of fear, though the spot was fearful and dangers lurked in its sides. And when he was come unto the end of the cave he found a great mass like to a mountain, and it was the Deev in his midday slumber. Then Rustem woke him, and the Deev was astonished at his daring, and sprang at the hero, and threw a great stone like a small mountain upon him. And Rustem's heart trembled, and he said unto himself, "If I escape to-day, I shall live for ever." And he fell on the Deev, and they struggled hot and sore, and the Deev tore Rustem, but Rustem defended himself, and they wrestled with force till that the blood and sweat ran down in rivers from their bodies. Then Rustem prayed to God, and God heard him and gave him strength, and in the end Rustem overcame the White Deev and slew him.
And he severed his head from his trunk, and cut his heart from out his midst.
Then Rustem returned him unto Aulad and told him what he had done.
And Aulad said-"O brave lion, who hast vanquished the world with thy sword, release now, I pray thee, this thy servant, for thy snare is entered into my flesh. And suffer that I recall to thee how that thou hast promised to me a recompense, and surely thou wilt fulfil thy word."
And Rustem answered and said, "Ay, verily; but I have yet much to do ere that my mission be ended. For I have still to conquer the King of Mazinderan; but when these things shall be accomplished, in truth I will fulfil my words unto thee."
Then he bade Aulad follow him, and they retraced their steps until they were come unto the spot where Kai Kaous was held in bondage.
And when Kai Kaous learned that Rustem was returned with victory upon his brow he shouted for joy, and all the host shouted with him, and they could not contain themselves for happiness. And they called down the blessings of Heaven upon the head of Rustem. But when the hero came before them, he took of the blood of the White Deev and poured it into their eyes, and the eyes of Kai Kaous and his men were opened, and they once again beheld the glory of the day. Then they swept the ground around them with fire, with swords they overcame their gaolers.