کتاب الفتن · نُعیم بن حماد

A young boy with a light, yellow beard will appear on the banner of the Mahdi. If he faced the mountains, he would shake them and move them until Elijah descends.

Al-Mahdi was born in Medina. He is from the family of the Prophet ﷺ. His name is the name of my father, and his emigration is Jerusalem. He has a thick beard, dark-eyed, bright lines. His face is clean and radiant. On his shoulder is the sign of the Prophet. He will emerge with the banner of the Prophet ﷺ from a square black velvet robe, which contains a stone that has not been unfurled since the death of the Messenger of Allah ﷺ. It will not be unfurled until the Mahdi emerges. Allah will provide him with three thousand angels who will strike the faces and backs of those who oppose them. He will be sent when he is between thirty and forty.