Musnad Ahmad 5:30

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