Sahih al-Bukhari 6712
صحيح البخاري#6712Sahihحَدَّثَنَا عُثْمَانُ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا الْقَاسِمُ بْنُ مَالِكٍ الْمُزَنِيُّ، حَدَّثَنَا الْجُعَيْدُ بْنُ عَبْدِ الرَّحْمَنِ، عَنِ السَّائِبِ بْنِ يَزِيدَ، قَالَ كَانَ الصَّاعُ عَلَى عَهْدِ النَّبِيِّ صلى الله عليه وسلم مُدًّا وَثُلُثًا بِمُدِّكُمُ الْيَوْمَ فَزِيدَ فِيهِ فِي زَمَنِ عُمَرَ بْنِ عَبْدِ الْعَزِيزِ.
Narrated Al-Ju'aid bin `Abdur-Rahman:As-Sa'ib bin Yazid said, "The Sa' at the time of the Prophet (ﷺ) was equal to one Mudd plus one-third of a Mudd of your time, and then it was increased in the time of Caliph `Umar bin `Abdul `Aziz
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: 84:5