Sahih al-Bukhari 7041
صحيح البخاري#7041SahihNarrated Abu Musa:The Prophet (ﷺ) said, "I saw in a dream that I waved a sword and it broke in the middle, and behold, that symbolized the casualties the believers suffered on the Day (of the battle) of Uhud. Then I waved the sword again, and it became better than it had ever been before, and behold, that symbolized the Conquest (of Mecca) which Allah brought about and the gathering of the believers
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: 91:55