"We were with the Messenger of Allah on a campaign, and he said: 'Hasten to perform prayer on a cloudy day, for whoever misses the 'Asr prayer, all his good deeds will be in vain.'"  

كُنَّا مَعَ رَسُولِ اللَّهِ ﷺ فِي غَزْوَةٍ فَقَالَ بَكِّرُوا بِالصَّلاَةِ فِي الْيَوْمِ الْغَيْمِ فَإِنَّهُ مَنْ فَاتَتْهُ صَلاَةُ الْعَصْرِ حَبِطَ عَمَلُهُ