Musnad Ahmad 5:568

'Abd al-Rahman ibn Mahdi narrated to us, from Shu'bah, from al-Hakam, from Yahya ibn al-Jazzar, from 'Ali: That the Prophet, peace and blessings of Allah be upon him, was sitting on the day of the Trench (al-Khandaq) at a gap of the trench, and he said: "They distracted us from the middle prayer until the sun set. May Allah fill their bellies and their houses with fire."