Ghiyath Bakri, may Allah have mercy on him, says that we used to attend the gathering of Hazrat Abu Saeed Khudri, may Allah be pleased with him, in Madinah Munawwarah. Once, I asked him about the Seal of Prophethood of the Prophet (peace and blessings be upon him), "which was between his two shoulders." He pointed with his index finger and said that between the Prophet’s (peace and blessings be upon him) two shoulders was a piece of flesh, filled and raised, of about this size.