Sunan an-Nasa'i #837 · The Book of Leading the Prayer (Al-Imamah)

Sunan an-Nasa'iIt was narrated from Ibn 'Umar that the Messenger of Allah
Sunan an-Nasa'i · Book 10 · The Book of Leading the Prayer (Al-Imamah)
Sunan an-Nasa'i · كتاب 10 · كتاب الإمامة
"Praying in congregation is twenty-seven times better than praying alone
أَخْبَرَنَا قُتَيْبَةُ، عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏
"‏ صَلاَةُ الْجَمَاعَةِ تَفْضُلُ عَلَى صَلاَةِ الْفَذِّ بِسَبْعٍ وَعِشْرِينَ دَرَجَةً ‏"‏ ‏.‏
Reference : Sunan an-Nasa'i 837In-book reference : Book 10, Hadith 61