Sahih al-Bukhari 1945
صحيح البخاري#1945Sahihحَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، حَدَّثَنَا يَحْيَى بْنُ حَمْزَةَ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ يَزِيدَ بْنِ جَابِرٍ، أَنَّ إِسْمَاعِيلَ بْنَ عُبَيْدِ اللَّهِ، حَدَّثَهُ عَنْ أُمِّ الدَّرْدَاءِ، عَنْ أَبِي الدَّرْدَاءِ ـ رضى الله عنه ـ قَالَ خَرَجْنَا مَعَ النَّبِيِّ صلى الله عليه وسلم فِي بَعْضِ أَسْفَارِهِ فِي يَوْمٍ حَارٍّ حَتَّى يَضَعَ الرَّجُلُ يَدَهُ عَلَى رَأْسِهِ مِنْ شِدَّةِ الْحَرِّ، وَمَا فِينَا صَائِمٌ إِلاَّ مَا كَانَ مِنَ النَّبِيِّ صلى الله عليه وسلم وَابْنِ رَوَاحَةَ.
Narrated Abu Ad-Darda:We set out with Allah's Messenger (ﷺ) on one of his journeys on a very hot day, and it was so hot that one had to put his hand over his head because of the severity of heat. None of us was fasting except the Prophet and Ibn Rawaha
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: 30:52