Sahih al-Bukhari 1985
صحيح البخاري#1985Sahihحَدَّثَنَا عُمَرُ بْنُ حَفْصِ بْنِ غِيَاثٍ، حَدَّثَنَا أَبِي، حَدَّثَنَا الأَعْمَشُ، حَدَّثَنَا أَبُو صَالِحٍ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ قَالَ سَمِعْتُ النَّبِيَّ صلى الله عليه وسلم يَقُولُ " لاَ يَصُومَنَّ أَحَدُكُمْ يَوْمَ الْجُمُعَةِ، إِلاَّ يَوْمًا قَبْلَهُ أَوْ بَعْدَهُ ".
Narrated Abu Huraira:I heard the Prophet (ﷺ) saying, "None of you should fast on Friday unless he fasts a day before or after it
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: 30:92