Sahih al-Bukhari 1003
صحيح البخاري#1003SahihNarrated Anas bin Malik:The Prophet (ﷺ) recited Qunut for one month (in the Fajr prayer) asking Allah to punish the tribes of Ral and Dhakwan
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 14:14