Sahih al-Bukhari 1657
صحيح البخاري#1657Sahihحَدَّثَنَا قَبِيصَةُ بْنُ عُقْبَةَ، حَدَّثَنَا سُفْيَانُ، عَنِ الأَعْمَشِ، عَنْ إِبْرَاهِيمَ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ يَزِيدَ، عَنْ عَبْدِ اللَّهِ ـ رضى الله عنه ـ قَالَ صَلَّيْتُ مَعَ النَّبِيِّ صلى الله عليه وسلم رَكْعَتَيْنِ، وَمَعَ أَبِي بَكْرٍ ـ رضى الله عنه ـ رَكْعَتَيْنِ وَمَعَ عُمَرَ ـ رضى الله عنه ـ رَكْعَتَيْنِ، ثُمَّ تَفَرَّقَتْ بِكُمُ الطُّرُقُ، فَيَا لَيْتَ حَظِّي مِنْ أَرْبَعٍ رَكْعَتَانِ مُتَقَبَّلَتَانِ.
Narrated `Abdullah bin Mas`ud:I offered (only a) two rak`at prayer with the Prophet (at Mina), and similarly with Abu Bakr and with `Umar, and then you differed in opinions. Wish that I would be lucky enough to have two of the four rak`at accepted (by Allah)
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 25:138