This is a survey of one of Prophet Muhammad’s (S.) companions’ biography. He narrated from the Prophet (S.) so many traditions until he exceeded all the limits, and the Sunni books of Hadith quoted from him until they exceeded the limits too. We didn’t have any way in front of this large number of traditions narrated by this man (Abu Hurayra) except to search for their sources because they concerned our religious and psychological life directly; otherwise we would leave them and their sources aside and look for something more important.