Sunan Ibn Majah 972
سنن ابن ماجه#972Da'ifحَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ، حَدَّثَنَا الرَّبِيعُ بْنُ بَدْرٍ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، عَمْرِو بْنِ جَرَادٍ عَنْ أَبِي مُوسَى الأَشْعَرِيِّ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " اثْنَانِ، فَمَا فَوْقَهُمَا، جَمَاعَةٌ " .
It was narrated that Abu Musa Al-Ash’ari said:“The Messenger of Allah (ﷺ) said: ‘Two or more people are a congregation.’”
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:
Al-AlbaniDaif
Muhammad Fouad Abd al-BaqiDaif
Shuaib Al ArnautVery Daif
Zubair Ali ZaiDaif
In-book reference: 5:170