Sunan Ibn Majah — The Book On The Mosques And The Congregations — Hadith No: 788
حَدَّثَنَا أَبُو كُرَيْبٍ، حَدَّثَنَا أَبُو مُعَاوِيَةَ، عَنْ هِلاَلِ بْنِ مَيْمُونٍ، عَنْ عَطَاءِ بْنِ يَزِيدَ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " صَلاَةُ الرَّجُلِ فِي جَمَاعَةٍ تَزِيدُ عَلَى صَلاَتِهِ فِي بَيْتِهِ خَمْسًا وَعِشْرِينَ دَرَجَةً " .
Translation
It was narrated that Abu Sa'eed Al-Khudri said:"The Messenger of Allah said: 'the prayer of a man in congregation is twenty-five levels higher than his prayer in his home