Sahih al-Bukhari 1548
صحيح البخاري#1548SahihNarrated Anas:The Prophet (ﷺ) offered four rak`at of the Zuhr prayer in Medina and two rak`at of the `Asr prayer in Dhul-Hulaifa and I heard them (the companions of the Prophet) reciting Talbiya together loudly to the extent of shouting
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: 25:34