Sahih al-Bukhari 2951
صحيح البخاري#2951SahihNarrated Anas:The Prophet (ﷺ) offered a four-rak`at Zuhr prayer at Medina and then offered a two rak`at `Asr prayer at Dhul-Hulaifa and I heard the companions of the Prophet (ﷺ) reciting Talbiya aloud (for Hajj and `Umra) altogether
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: 56:163