Alba bin Ahmar Yashkari narrates that Abu Zaid Amr bin Akhtab Ansari (may Allah be pleased with him) told me, he says that the Messenger of Allah (peace and blessings be upon him) said to me: "O Abu Zaid! Come near me, and pass your hand over my back." So I passed my hand over the back of the Prophet (peace and blessings be upon him), and my fingers touched the Seal of Prophethood. (Alba bin Ahmar Yashkari) says: I asked, "What was the Seal of Prophethood like?" He said: "A collection of some hairs."