Anas bin Malik reported,

The Prophet ﷺ sent out a military expedition of men known as the Reciters, and they were killed. I never saw the Prophet ﷺ grieve over anything as deeply as he grieved over them. He recited the qunut for an entire month during the dawn prayer, saying, "The tribe of Usayyah has disobeyed Allah and His Messenger."

Bukhari 6394

Sahih

حدثنا الحسن بن الربيع حدثنا أبو الأحوص عن عاصم

عن أنس رضي الله عنه

بعث النبي ﷺ سرية يقال لهم القراء فأصيبوا فما رأيت النبي ﷺ وجد على شيء ما وجد عليهم فقنت شهرا في صلاة الفجر ويقول إن عصية عصوا الله ورسوله

البخاري 6394صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Supplications
Chapter
Supplication against the polytheists
Numbering
Darussalam 6394
Bukhari 6394