Shahnameh by Abolqasem Ferdowsi — Read

By night, Banduy and Gostahm quickly sent a messenger with a change of horses to Khosrow, who was then at the fire-temple called Azar-Goshasp, to tell him what had happened. But when the envoy described the tumult in Baghdad, the young man's face turned as pale as fenugreek. He said, "Any man who ignorantly leaves the ways of wisdom and has no fear of the turning heavens will lead a profitless life. If this evil you describe were to please me, my sleep and food would turn to fire. Even though my father tried to shed my blood and I fled from Iran, I am still his slave and will listen to all he has to say."

Immediately he set off with a large number of troops from Barda', Ardebil, and Armenia, traveling as quickly as fire. When news reached Baghdad that a new claimant to the throne was on his way, the town grew peaceful again, and Khosrow was encouraged by this calm. The city's chieftains came out to welcome him; they seated him on an ivory throne and placed a golden torque about his neck and a splendid crown on his head. Khosrow entered the town in sorrow and went sighing to his father, his face a witness to the grief he felt. When he saw him, he wept and paid him homage; the two were closeted together for a long time. Khosrow said, "You are a scion of Nushin-Ravan, but misfortune has dogged your reign. You know that if I had been here to support you, not even a needle would have been permitted to scratch the tip of your finger. Think of what your orders are for me, now that sorrow has come to you and my heart is filled with grief.