Sahih Bukhari

Narrated Sa`id bin Jubair:I asked Ibn `Abbas about Surat Al-Tauba, and he said, ""Surat Al-Tauba? It is exposure (of all the evils of the infidels and the hypocrites). And it continued revealing (that the oft-repeated expression): '...and of them ...and of them.' till they started thinking that none would be left unmentioned therein."" I said, ""What about) Surat Al-Anfal?"" He replied, ""Surat Al-Anfal was revealed in connection with the Badr Battle."" I said, ""(What about) Surat Al-Hashr?"" He replied, ""It was revealed in connection with Bani an-Nadir