Musnad Abu Ya'la al-Mawsili 3:124

Ubayd Allah ibn Umar narrated to us, Abd al-A’la ibn Abd al-A’la narrated to us, Sa’id narrated to us, from Qatadah, from Abu Hassan al-A’raj, from Ubaydah al-Salmani, from Ali: That the Prophet of Allah, may Allah bless him and grant him peace, was detained by the polytheists on the day of the Confederates (al-Ahzab) from the Afternoon Prayer (Asr) until the sun was about to set. He said: "O Allah, fill their graves and their houses with fire, just as they occupied us from the Middle Prayer until the sun was about to set."