Sahih al-Bukhari 1089
صحيح البخاري#1089SahihNarrated Anas bin Malik: I offered four rak`at of Zuhr prayer with the Prophet (ﷺ) at Medina and two rak`at at Dhul-Hulaifa. (i.e. shortened the `Asr prayer)
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: 18:10