Sahih al-Bukhari 6394
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."
حَدَّثَنَا 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 ‏"‏‏.‏