Musannaf Ibn Abi Shaybah 40528 — Reports on Uthman (may Allah be)

It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him): We were with the Prophet (peace and blessings be upon him) when some young men of Banu Hashim came before us. When the Prophet (peace and blessings be upon him) saw them, tears came to his eyes and his colour changed. I said: "O Messenger of Allah (peace and blessings be upon him), we see something on your face that we dislike." The Prophet (peace and blessings be upon him) said: "Allah Almighty has preferred the Hereafter over this world for my household. After me, my household will face trial, scattering and exile, until a people will come from the direction of the east with black banners. They will demand the truth, but it will not be given to them. So they will fight and be given victory, and then their demand will be granted, but they will not accept it until the matter of the caliphate is handed over to a man of my household. He will fill the earth with justice just as those before him filled it with oppression. Whoever among you lives to see it should go to them, even if he has to crawl over the snow."