Sunan an-Nasa'i, Volume 1, Book 5, Hadith 487 (DarusSalam) ⓘ
It was narrated from Abu Hurairah that the Messenger of Allah said: "Prayer in congregation is twenty-five times more virtuous than the prayer of any one of you offered on his own. The angels of the night and the day meet at Fajr prayer. Recite if you wish: Verily, the recitation of the Qur'an in the early dawn is ever witnessed."[1] [1]Al-Isra' 17:78.
أَخْبَرَنَا كَثِيرُ بْنُ عُبَيْدٍ، قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ حَرْبٍ، عَنِ الزُّبَيْدِيِّ، عَنِ الزُّهْرِيِّ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " تَفْضُلُ صَلاَةُ الْجَمْعِ عَلَى صَلاَةِ أَحَدِكُمْ وَحْدَهُ بِخَمْسَةٍ وَعِشْرِينَ جُزْءًا وَيَجْتَمِعُ مَلاَئِكَةُ اللَّيْلِ وَالنَّهَارِ فِي صَلاَةِ الْفَجْرِ وَاقْرَءُوا إِنْ شِئْتُمْ { وَقُرْآنَ الْفَجْرِ إِنَّ قُرْآنَ الْفَجْرِ كَانَ مَشْهُودًا } " .
also referenced under: Hadith 486 (Reference) & Book 5, Hadith 39 (In-Book)