The Book Pertaining to the Merits of the Companions (Allah Be Pleased With Them) of the Holy Prophet (May Peace Be Upon Him) (Kitab Al-Fada'il Al-Sahabah)
Muslim :: Book 31 : Hadith 5942
Abu Huraira reported: Allah's Messenger (may peace be upon him) was upon the mountain of Hira, ' and there were along with him Abu Bakr, Umar, Uthman. 'Ali, Talha, 'Zubair, that the mountain stirred; thereupon Allah's Messenger (may peace be upon him) said: Be calm, there is none upon you but a Prophet, a Fiddle (the testifier of truth) and a Martyr.