(42) باب فَضْلِ صَلاَةِ الجَمَاعَةِ وَبَيَانِ التَّشْدِيدِ فِي التَّخَلُّفِ عَنْهَا
Abu Huraira reported Allah's Messenger (ﷺ) as saying:
Prayer said in a congregation is twenty-five degrees more excellent than prayer said by a single person.
Reference: Sahih Muslim 649 a
In-book reference: Book 5, Hadith 308
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1360