Sahih Al Bukhari – Book of Interpretation Of Dreams
Volumn 009, Book 087, Hadith Number 122.
—————————————–
Narated By Abu Huraira RA: I heard the Prophet PBUH saying, "Whoever sees me in a dream will see me in his wakefulness, and Satan cannot imitate me in shape." Abu 'Abdullah said, "Ibn Sirin said, 'Only if he sees the Prophet in his (real) shape.'"