The Prophet (ﷺ) said, "A good dream that comes true is from Allah, and a bad dream is from Satan, so if anyone of you sees a bad dream, he should seek refuge with Allah from Satan and should spit on the left, for the bad dream will not harm him."
Sahih al-Bukhari Book 91, Hadith 5
← Previous Hadith The Prophet (ﷺ) said, "If anyone of you sees a dream that he likes, then it is from Allah, and he should thank Allah for it and narrate it to others; but if he sees something else, i.e., a dream that he dislikes, then it is from Satan, and he should seek refuge with Allah from its evil, and he should not mention it to anybody, for it will not harm him."

Sahih al-Bukhari Book 91, Hadith 4 Next Hadith → The Prophet (ﷺ) said, "The (good) dreams of a faithful believer is a part of the forty-six parts of prophetism:'

Sahih al-Bukhari Book 91, Hadith 6