سُنَنُ النَّسَائِيِّ
Sunan an-Nasa’i 838
The Book of Leading the Prayer (Al-Imamah)
Virtue of (prayer in) congregation
أَخْبَرَنَا قُتَيْبَةُ، عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ صَلاَةُ الْجَمَاعَةِ أَفْضَلُ مِنْ صَلاَةِ أَحَدِكُمْ وَحْدَهُ خَمْسًا وَعِشْرِينَ جُزْءًا .
It was narrated from Abu Hurairah that the Messenger of Allah (ﷺ) said: "Praying in congregation is twenty-five portions better than one of you praying alone."
Sunan an-Nasa'i, 838Sahih (Darussalam)