Sahih al-Bukhari 598
Sahih al-Bukhari · Book 9: Times of the Prayers · The Qada of prayers (Qada means to perform or offer or do a missed religious obligation after its stated time)
Narrated Jabir:
حَدَّثَنَا مُسَدَّدٌ ، قَالَ حَدَّثَنَا يَحْيَى ، عَنْ هِشَامٍ ، قَالَ حَدَّثَنَا يَحْيَى ـ هُوَ ابْنُ أَبِي كَثِيرٍ ـ عَنْ أَبِي سَلَمَةَ ، عَنْ جَابِرٍ ، قَالَ جَعَلَ عُمَرُ يَوْمَ الْخَنْدَقِ يَسُبُّ كُفَّارَهُمْ وَقَالَ مَا كِدْتُ أُصَلِّي الْعَصْرَ حَتَّى غَرَبَتْ. قَالَ فَنَزَلْنَا بُطْحَانَ، فَصَلَّى بَعْدَ مَا غَرَبَتِ الشَّمْسُ، ثُمَّ صَلَّى الْمَغْرِبَ.
`Umar came cursing the disbelievers (of Quraish) on the day of Al-Khandaq (the battle of Trench) and said, "I could not offer the `Asr prayer till the sun had set. Then we went to Buthan and he offered the (`Asr) prayer after sunset and then he offered the Maghrib prayer.