Musnad Ahmad 1007:90

Ya'qub narrated to us, the son of the brother of Ibn Shihab narrated to me, from his uncle Muhammad ibn Shihab, Abu Salamah ibn 'Abd al-Rahman ibn 'Awf narrated to me, that Abu Hurayrah said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "Whoever sees me in a dream will see me in wakefulness, or it is as if he saw me in wakefulness; the Shaytan does not impersonate me." Abu Salamah said: And Abu Qatadah said: The Messenger of Allah, peace and blessings of Allah be upon him, said: "Whoever sees me has seen the truth."