Sunan Ibn Majah Book 35, Hadith 8
“Whoever
sees me in a dream, has seen me in reality, for Satan cannot appear
in
my form.”
“The Messenger of Allah (ﷺ) drew aside the curtain when he was sick, and the rows (of worshippers) were behind Abu Bakr. He said: ‘O people, nothing of the glad tidings of prophecy is left except a good dream that a Muslim sees or is seen about him.’”
“Whoever sees me in a dream has (really) seen me, for Satan cannot appear in my form.”