Sahih Muslim 5904
صحيح مسلم#5904SahihJabir reported Allah's Messenger (ﷺ) as saying:If anyone sees a dream which he does not like, he should spit on his left side three times, and seek refuge with Allah from the Satan three times, and let him turn over from the side on which he was sleeping
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: 42:8