Sahih al-Bukhari 7005
صحيح البخاري#7005SahihNarrated Abu Qatada Al-Ansari:(a companion of the Prophet (ﷺ) and one of his cavalry men) "I heard Allah's Messenger (ﷺ) saying, "A good dream is from Allah, and a bad dream is from Satan; so, if anyone of you had a bad dream which he disliked, then he should spit on his left and seek refuge with Allah from it, for it will 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 al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 91:23