Sahih al-Bukhari 553
Sahih al-Bukhari · Book 9: Times of the Prayers · One who omits (does not offer) the 'Asr prayer (intentionally)
Narrated Abu Al-Mahh [??]:
حَدَّثَنَا مُسْلِمُ بْنُ إِبْرَاهِيمَ ، قَالَ حَدَّثَنَا هِشَامٌ ، قَالَ حَدَّثَنَا يَحْيَى بْنُ أَبِي كَثِيرٍ ، عَنْ أَبِي قِلاَبَةَ ، عَنْ أَبِي الْمَلِيحِ ، قَالَ كُنَّا مَعَ بُرَيْدَةَ فِي غَزْوَةٍ فِي يَوْمٍ ذِي غَيْمٍ فَقَالَ بَكِّرُوا بِصَلاَةِ الْعَصْرِ فَإِنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " مَنْ تَرَكَ صَلاَةَ الْعَصْرِ فَقَدْ حَبِطَ عَمَلُهُ " .
We were with Buraida in a battle on a cloudy day and he said, "Offer the `Asr prayer early as the Prophet said, "Whoever leaves the `Asr prayer, all his (good) deeds will be annulled."