Narrated Jabir bin `Abdullah: On the day of the Khandaq `Umar came, cursing the disbelievers of Quraish and said, O Allah's Apostle! I have not offered the `Asr prayer and the sun has set. The Prophet replied, By Allah! I too, have not offered the prayer yet. The Prophet then went to Buthan, performed ablution and performed the `Asr prayer after the sun had set and then offered the Maghrib prayer after it.