Musnad Ahmad 30:2307

Qutaybah narrated to us, 'Abd al-'Aziz narrated to us, from Suhayl, from his father, from Abu Hurayrah, that the Messenger of Allah (peace and blessings of Allah be upon him) was upon Hira, he and Abu Bakr, 'Umar, 'Uthman, 'Ali, Talhah, and al-Zubayr. The rock moved, so the Messenger of Allah (peace and blessings of Allah be upon him) said: "Be still, for there is upon you none but a Prophet, or a Siddiq (truthful one), or a martyr."