Sahih al-Bukhari 4645
صحيح البخاري#4645SahihNarrated Sa`id bin Jubair:I asked Ibn `Abbas regarding Surat-al-Anfal. He said, "It was revealed in connection with the Battle of Badr
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: 65:167