Sahih al-Bukhari 4041
صحيح البخاري#4041SahihNarrated Ibn `Abbas:On the day of Uhud. the Prophet (ﷺ) said, "This is Gabriel holding the head of his horse and equipped with war material
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: 64:88