Sahih al-Bukhari 1084
صحيح البخاري#1084SahihNarrated `Abdur Rahman bin Yazid:We offered a four rak`at prayer at Mina behind Ibn `Affan . `Abdullah bin Mas`ud was informed about it. He said sadly, "Truly to Allah we belong and truly to Him we shall return." And added, "I prayed two rak`at with Allah's Messenger (ﷺ) at Mina and similarly with Abu Bakr and with `Umar (during their caliphates)." He further said, "May I be lucky enough to have two of the four rak`at accepted (by Allah)
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: 18:5