Sunan Ibn Majah Book 35, Hadith 13
“Whoever sees me in a dream has (really) sees me, for Satan
cannot
imitate me.”
“Whoever sees me in a dream, it is as if he has seen me when he is awake, for Satan is not able to resemble me.”
“Dreams are of three types: Glad tidings from Allah, what is on a person’s mind, and frightening dreams from Satan. If any of you sees a dream that he likes, let him tell others of it if he wishes, but if he sees something that he dislikes, he should not tell anyone about it, and he should get up and perform prayer.”