Sahih al-Bukhari 1655
صحيح البخاري#1655SahihNarrated `Abdullah bin `Umar:Allah's Messenger (ﷺ) offered a two-rak`at prayer at Mina. Abu Bakr, `Umar and `Uthman, (during the early years of his caliphate) followed the same practice
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: 25:136