Narrated 'Ali: When it was the day of the battle of Al-Ahzab (i.e. the clans), Allah's Apostle said, "O Allah! Fill their (i.e. the infidels') houses and graves with fire as they busied us so much that we did not perform the prayer (i.e. 'Asr) till the sun set."
Narrated 'Abdullah bin Abi Aufa: Allah's Apostle invoked evil upon the pagans on the ay (of the battle) of Al-Ahzab, saying, "O Allah! The Revealer of the Holy Book, the Swift-Taker of Accounts, O Allah, defeat Al-Ahzab (i.e. the clans), O Allah, defeat them and shake them."