Narrated Jabir bin `Abdullah: `Umar bin Al-Khattab came on the day of Al-Khandaq after the sun had set and he was abusing the infidels of Quraish saying, "O Allah's Apostle! I was unable to offer the (`Asr) prayer till the sun was about to set." The Prophet said, "By Allah, I have not offered this (i.e. `Asr) prayer." So we came down along with the Prophet to Buthan where he performed ablution for the prayer and then we performed the ablution for it. Then he offered the `Asr prayer after the sun had set, and after it he offered the Maghrib prayer.

Narrated Sahl (bin Sa`d): The distance between the Musalla of Allah's Apostle and the wall was just sufficient for a sheep to pass through .

Narrated Jabir bin `Abdullah: On the day of Al-Khandaq (the trench), `Umar bin Al-Khattab went to the Prophet and said, "O Allah's Apostle! By Allah, I could not pray (the `Asr) till the sun had set." `Umar told this to the Prophet at the time when a fasting person had done Iftar (taken his meals). The Prophet then went to Buthan and I was with him. He performed ablution and offered the `Asr prayer after the sun had set and then the Maghrib prayer.

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."