Zahhāk lives the next few years in fear and anxiety of Fereydun, and thus writes a document testifying to the virtue and righteousness of his kingdom that would be certified by the kingdom's elders and social elite, in the hope that his enemy would be convinced against exacting vengeance. Much of the summoned assembly indulge the testimony out of fear for their lives. However, a blacksmith named Kāva (Kaveh) speaks out in anger for his children having been murdered to feed Zahhāk's snakes, and for his final remaining son being sentenced to the same fate. Zahhāk orders for Kāva's son to be released in a bid to coerce Kāva into certifying the document, but Kāva tears up the document, leaves the court, and creates a flag out of his blacksmith's apron as a standard of rebellion – the Kāviyāni Banner, derafsh-e Kāviyānī (درفش کاویانی). Kāva proclaims himself in support of Fereydun as ruler, and rallies a crowd to follow him to the Alborz mountains, where Fereydun is now living as a young man. Fereydun agrees to lead the people against Zahhāk and has a mace made for him with a head like that of an ox. Fereydun goes forth to fight against Zahhāk, who has already left his capital, which falls to Fereydun with small resistance. Fereydun frees all of Zahhāk's prisoners, including Arnavāz and Shahrnāz. Kondrow, Zahhāk's treasurer, pretends to submit to Fereydun, but discreetly escapes to Zahhāk and reports to him what has happened. Zahhāk initially dismisses the matter, but he is incensed to learn that Fereydun has seated Jamshid's daughters on thrones beside him like his queens, and immediately hastens back to his city to attack Fereydun. Zahhāk finds his capital held strongly against him, and his army is in peril from the defense of the city. Seeing that he cannot reduce the city, he sneaks into his own palace as a spy and attempts to assassinate Arnavāz and Shahrnāz. Fereydun strikes Zahhāk down with his ox-headed mace, but does not kill him; on the advice of an angel, he binds Zahhāk and imprisons him in a cave underneath Mount Damāvand. Fereydun binds Zahhāk with a lion's pelt tied to great nails fixed into the walls of the cavern, where Zahhāk will remain until the end of the world. 

Mughal-Library