Narrated Sa`id bin Jubair:
I asked Ibn `Abbas regarding Surat-al-Anfal. He said, "It was revealed in connection with the Battle of Badr." (JA)
USC-MSA web (English) reference: Vol. 6, Book 60, Hadith 168 (JA)
Arabic reference (JA): Book 65, Hadith 4645 (JA)