from the Prophet ﷺ - that he said: ʿWhoever prays ʿIshaʿ and Fajr prayer in congregation, it is as if he spent the night in prayer (qiyamul-lail).” ‘Abdur-Rahman said: Whoever prays ʿIshaʿ in congregation, it is as if he spent half the night in prayer, and whoever prays Fajr in congregation, it is as if he spent the entire night in prayer,
عَنِ النَّبِيِّ ﷺ قَالَ مَنْ صَلَّى صَلاةَ الْعِشَاءِ وَالصُّبْحِ فِي جَمَاعَةٍ فَهُوَ كَقِيَامِ لَيْلَةٍ وَقَالَ عَبْدُ الرَّحْمَنِ مَنْ صَلَّى الْعِشَاءَ فِي جَمَاعَةٍ فَهُوَ كَقِيَامِ نِصْفِ لَيْلَةٍ وَمَنْ صَلَّى الصُّبْحَ فِي جَمَاعَةٍ فَهُوَ كَقِيَامِ لَيْلَةٍ