Congregational Prayer and Its Virtue
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 57
وَ صَلَّى رَسُولُ اَللَّهِ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ اَلْفَجْرَ ذَاتَ يَوْمٍ فَلَمَّا اِنْصَرَفَ أَقْبَلَ بِوَجْهِهِ عَلَى أَصْحَابِهِ فَسَأَلَ عَنْ أُنَاسٍ يُسَمِّيهِمْ بِأَسْمَائِهِمْ هَلْ حَضَرُوا اَلصَّلاَةَ قَالُوا لاَ يَا رَسُولَ اَللَّهِ فَقَالَ «غُيَّبٌ هُمْ » فَقَالُوا لاَ يَا رَسُولَ اَللَّهِ قَالَ «أَمَا إِنَّهُ لَيْسَ مِنْ صَلاَةٍ أَثْقَلَ عَلَى اَلْمُنَافِقِينَ مِنْ هَذِهِ اَلصَّلاَةِ وَ صَلاَةِ اَلْعِشَاءِ اَلْآخِرَةِ وَ لَوْ عَلِمُوا اَلْفَضْلَ اَلَّذِي فِيهِمَا لَأَتَوْهُمَا وَ لَوْ حَبْواً.
The Messenger of Allah صلى الله عليه وعلى آله وسلم prayed the Fajr (dawn) prayer one day, and after finishing, he turned his face towards his companions and asked about certain people by name, asking if they were present for the prayer. They replied: "No, O’ Messenger of Allah صلى الله عليه وعلى آله وسلم." He صلى الله عليه وعلى آله وسلم then said: "Are they absent?" They said: "No, O’ Messenger of Allah صلى الله عليه وعلى آله وسلم." He صلى الله عليه وعلى آله وسلم said: "Indeed, there is no prayer heavier on the hypocrites than this prayer (Fajr) and the 'Isha' (night) prayer. If they knew the reward that is in them, they would come to them, even if crawling."
- Ṣaḥīḥ al-Faqīh