Messenger of Allah ﷺ said, "The prayer in congregation is twenty seven times superior to the prayer offered by person alone." (Using translation from Bukhārī 645)
أَنَّ رَسُولَ اللهِ ﷺ قَالَ «صَلَاةُ الْجَمَاعَةِ تَفْضُلُ عَلَى صَلَاةِ الْفَذِّ بِسَبْعٍ وَعِشْرِينَ دَرَجَةً»