Sayyiduna Abu Zayd Amr bin Akhtab (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said to me: "O Abu Zayd! Come near me and pass your hand over my back." The Prophet (peace and blessings be upon him) removed the cloth from his back. I passed my hand over his back, and I placed my fingers on the Seal of Prophethood. The narrator says: He was asked: What is meant by the Seal of Prophethood? He replied: It was some hair gathered together.
Imam Ahmad, Imam Abu Ya'la and Imam al-Tabarani recorded it. In one of his narrations he recorded these additional words: "I saw the Seal of Prophethood on the back of the Prophet (peace and blessings be upon him); it was on his back like this, as though a seal had been stamped there." The narrators of one of its chains are the narrators of the "Sahih".