ʿUmar came cursing the disbelievers (of Quraish) on the day of Al-Khandaq (the battle of Trench) and said, "I could not offer the ʿAsr prayer till the sun had set. Then we went to Buthan and he offered the (ʿAsr) prayer after sunset and then he offered the Maghrib prayer.  

جَعَلَ عُمَرُ يَوْمَ الْخَنْدَقِ يَسُبُّ كُفَّارَهُمْ وَقَالَ مَا كِدْتُ أُصَلِّي الْعَصْرَ حَتَّى غَرَبَتْ قَالَ فَنَزَلْنَا بُطْحَانَ فَصَلَّى بَعْدَ مَا غَرَبَتِ الشَّمْسُ ثُمَّ صَلَّى الْمَغْرِبَ