Sahih al-Bukhari 6394
صحيح البخاري#6394Sahihحَدَّثَنَا الْحَسَنُ بْنُ الرَّبِيعِ، حَدَّثَنَا أَبُو الأَحْوَصِ، عَنْ عَاصِمٍ، عَنْ أَنَسٍ ـ رضى الله عنه ـ قَالَ بَعَثَ النَّبِيُّ صلى الله عليه وسلم سَرِيَّةً يُقَالُ لَهُمُ الْقُرَّاءُ فَأُصِيبُوا، فَمَا رَأَيْتُ النَّبِيَّ صلى الله عليه وسلم وَجَدَ عَلَى شَىْءٍ مَا وَجَدَ عَلَيْهِمْ، فَقَنَتَ شَهْرًا فِي صَلاَةِ الْفَجْرِ وَيَقُولُ " إِنَّ عُصَيَّةَ عَصَوُا اللَّهَ وَرَسُولَهُ ".
Narrated Anas:The Prophet (ﷺ) sent a Sariya (an army detachment) consisting of men called Al-Qurra', and all of them were martyred. I had never seen the Prophet (ﷺ) so sad over anything as he was over them. So he said Qunut (invocation in the prayer) for one month in the Fajr prayer, invoking for Allah's wrath upon the tribe of 'Usaiya, and he used to say, "The people of 'Usaiya have disobeyed Allah and His Apostle
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: 80:89