Kitab al-Fitan · Nu'aym ibn Hammad

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.

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.

Black flags come out fighting the Sufyani. Among them is a young man from Bani Hashem, with a blank on his left shoulder, and on his front is a man from Bani Tamim called Shuaib bin Saleh. He defeats his companions.

If the Sufyani reached Kufa, and the agents of the family of Muhammad were killed, the Mahdi would emerge under his banner, Shuaib bin Saleh