Sahih al-Bukhari 3869
صحيح البخاري#3869SahihNarrated `Abdullah:The moon was split ( into two pieces ) while we were with the Prophet (ﷺ) in Mina. He said, "Be witnesses." Then a Piece of the moon went towards the mountain
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: 63:94