Sahih Muslim 221
صحيح مسلم#221Sahihحَدَّثَنَا مُحَمَّدُ بْنُ بَكَّارِ بْنِ الرَّيَّانِ، وَعَوْنُ بْنُ سَلاَّمٍ، قَالاَ حَدَّثَنَا مُحَمَّدُ بْنُ طَلْحَةَ، ح وَحَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ مَهْدِيٍّ، حَدَّثَنَا سُفْيَانُ، ح وَحَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، كُلُّهُمْ عَنْ زُبَيْدٍ، عَنْ أَبِي وَائِلٍ، عَنْ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " سِبَابُ الْمُسْلِمِ فُسُوقٌ وَقِتَالُهُ كُفْرٌ " . قَالَ زُبَيْدٌ فَقُلْتُ لأَبِي وَائِلٍ أَنْتَ سَمِعْتَهُ مِنْ عَبْدِ اللَّهِ يَرْوِيهِ عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم قَالَ نَعَمْ . وَلَيْسَ فِي حَدِيثِ شُعْبَةَ قَوْلُ زُبَيْدٍ لأَبِي وَائِلٍ .
It is narrated on the authority of 'Abdullah b. Mas'ud that the Messenger of Allah (may peace and blessings be upon him) observed:Abusing a Muslim is an outrage and fighting against him is unbelief. Zubaid said: I asked Abu Wa'il: Did you hear it from Abdullah narrating if from the Messenger of Allah (may peace and blessings be upon him)? He replied: Yes. But there is mention of the talk between Zubaid and Abu Wa'il in the hadith narrated by Shu'ba
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: 1:127