Sahih Muslim 5903
صحيح مسلم#5903SahihAbu Salama reported:I used to see (such horrible dreams) that I fell ill. I saw Abu Qatada who also said: I used to see dreams which made me sick until I heard Allah's Messenger (ﷺ) as saying: Good dreams are from Allah, so if any one of you sees which he likes he should not disclose it to one but whom he loves, but if he sees something which he does not like he should spit on his left side thrice and seek refuge with Allah from the mischief of the Satan and its mischief (i.e. of the dream), and he should not relate it to anyone, then it would not harm him
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 42:7