Prayer said in a congregation is twenty-five degrees more excellent than prayer said by a single person. (Using translation from Muslim 649a)
أَنَّ رَسُولَ اللهِ ﷺ قَالَ «صَلَاةُ الْجَمَاعَةِ أَفْضَلُ مِنْ صَلَاةِ أَحَدِكُمْ وَحْدَهُ خَمْسَةً وَعِشْرِينَ جُزْءًا»