Sahih al-Bukhari 6396
Narrated `Ali bin Abi Talib:
We were in the company of the Prophet (ﷺ) on the day (of the battle) of Al-Khandaq (the Trench). The 
Prophet said, "May Allah fill their (the infidels') graves and houses with fire, as they have kept us so 
busy that we could not offer the middle prayer till the sun had set; and that prayer was the `Asr 
prayer."
حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا الأَنْصَارِيُّ، حَدَّثَنَا هِشَامُ بْنُ حَسَّانَ، حَدَّثَنَا مُحَمَّدُ بْنُ سِيرِينَ، حَدَّثَنَا عَبِيدَةُ، حَدَّثَنَا عَلِيُّ بْنُ أَبِي طَالِبٍ ـ رضى الله عنه ـ قَالَ كُنَّا مَعَ النَّبِيِّ صلى الله عليه وسلم يَوْمَ الْخَنْدَقِ، فَقَالَ ‏
"‏ مَلأَ اللَّهُ قُبُورَهُمْ وَبُيُوتَهُمْ نَارًا، كَمَا شَغَلُونَا عَنْ صَلاَةِ الْوُسْطَى حَتَّى غَابَتِ الشَّمْسُ ‏"‏‏.‏ وَهْىَ صَلاَةُ الْعَصْرِ‏.‏