کتاب الفتن · نُعیم بن حماد

A black flag of Banu Abbas will emerge, then another black flag will emerge from Khorasan. Their hoods are black and their clothes are white. At the front of them is a man called Shuaib bin Saleh bin Shuaib from Tamim. They will defeat the companions of the Sufyani until he descends on Jerusalem. The Mahdi will establish his authority and extend to him three hundred men from the Levant. There will be seventy-two months between his emergence and the handing over of authority to the Mahdi.

If you see the black flags emerging from Khorasan, go to them, even if you crawl on the snow, for there is the Caliph of Allah, the Mahdi.

The black flags emerge from Khorasan with weak people who gather together. Allah supports them with His victory, and then the people of Morocco emerge as a result.

A young man from Banu Hashim emerges with his right hand free from Khurasan with black banners in his hands, Shuaib bin Saleh, fighting the companions of Sufyani and defeating them.

A black flag will emerge from Khorasan, until it ties its horses to this olive tree between Beit Lahia and Harasta. Olive trees will be set up between them, until the people of that banner descend upon it, and its horses are tied to it.

The black flags emerging from Khorasan will descend on Kufa, and when the Mahdi appears in Mecca, the pledge of allegiance will be sent to him