Musnad Ahmad 5:740

Muhammad ibn Ja‘far narrated to us, Sa‘id narrated to us, from Qatadah, from Abu Hassan al-A‘raj, from ‘Ubaydah, from ‘Ali ibn Abi Talib: That the Messenger of Allah (peace and blessings of Allah be upon him) said on the day of the Confederates (al-Ahzab): "O Allah, fill their houses and their graves with fire, just as they distracted us from the middle prayer, until the sun set."