Sahih Muslim 1476
صحيح مسلم#1476Sahihحَدَّثَنِي هَارُونُ بْنُ عَبْدِ اللَّهِ، وَمُحَمَّدُ بْنُ حَاتِمٍ، قَالاَ حَدَّثَنَا حَجَّاجُ بْنُ مُحَمَّدٍ، قَالَ قَالَ ابْنُ جُرَيْجٍ أَخْبَرَنِي عُمَرُ بْنُ عَطَاءِ بْنِ أَبِي الْخُوَارِ، أَنَّهُ بَيْنَا هُوَ جَالِسٌ مَعَ نَافِعِ بْنِ جُبَيْرِ بْنِ مُطْعِمٍ إِذْ مَرَّ بِهِمْ أَبُو عَبْدِ اللَّهِ خَتَنُ زَيْدِ بْنِ زَبَّانٍ مَوْلَى الْجُهَنِيِّينَ فَدَعَاهُ نَافِعٌ فَقَالَ سَمِعْتُ أَبَا هُرَيْرَةَ يَقُولُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " صَلاَةٌ مَعَ الإِمَامِ أَفْضَلُ مِنْ خَمْسٍ وَعِشْرِينَ صَلاَةً يُصَلِّيهَا وَحْدَهُ " .
Abu Huraira reported:The Messenger of Allah (way peace be upon him) said: Prayer along with the Imam is twenty-five times more excellent than prayer said by a single person
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 5:309