The Prophet ﷺ said, “Prayer in congregation is superior to prayer alone by twenty seven degrees.” [Bukhari & Muslim]
The Prophet ﷺ said, ”When you see a man frequenting the mosque, testify that he is a believer because Allah says: `Allah’s mosques are visited only by those who believe in Allah and the Last Day.”’[Tirmidhi]
The Prophet ﷺ said, ‘If someone prays ‘Isha’ in congregation, it is as if he had prayed half of the night. If someone prays Fajr in congregation, it is as if he had prayed the entire night.’” [Muslim]