In spite of these injunctions, a few faithful followers went with him, until they reached a place where the cold was so intense that they all froze to death, and thus left him to continue alone the journey from whence he never returned.
And not a trace was left behind, And not a dimple on the wave; All sought, but sought in vain, to find The spot which proved Kai-Khosrau's grave.
The successor which Kai-Khosrau had chosen proved a just ruler until he became jealous of his own son, Isfendiyar, who was also a great warrior, and who, like Rustem, accomplished seven great works.

He, too, overcame demons, wolves, lions, enchanters, dragons, and unchained elements, and on one occasion proceeded to rescue two of his sisters, who were detained captives in the fortress of Arjasp, a demon king.

Knowing he could not enter this stronghold by force, Isfendiyar penetrated into it in the guise of a merchant, having hidden in his chests a number of soldiers, who were to help him when the right moment came.

Thanks to their aid and to the fact that he began by intoxicating his foe, Isfendiyar triumphed.
The time came, however, when Isfendiyar was ordered by his father to bring Rustem to court in chains.

This task proved most distasteful to the prince, who, on approaching Rustem, explained that he was not a free agent.