Sahih Muslim 4630
صحيح مسلم#4630Sahihحَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، وَابْنُ، بَشَّارٍ قَالاَ حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، عَنْ أَبِي إِسْحَاقَ، قَالَ سَمِعْتُ الْبَرَاءَ بْنَ عَازِبٍ، يَقُولُ لَمَّا صَالَحَ رَسُولُ اللَّهِ صلى الله عليه وسلم أَهْلَ الْحُدَيْبِيَةِ كَتَبَ عَلِيٌّ كِتَابًا بَيْنَهُمْ قَالَ فَكَتَبَ " مُحَمَّدٌ رَسُولُ اللَّهِ " ثُمَّ ذَكَرَ بِنَحْوِ حَدِيثِ مُعَاذٍ غَيْرَ أَنَّهُ لَمْ يَذْكُرْ فِي الْحَدِيثِ " هَذَا مَا كَاتَبَ عَلَيْهِ " .
It has been narrated on the authority of Abu Ishaq, who heard Bars' b. Azib say:When the Messenger of Allah (ﷺ) made peace with the people of Hudaibiya, 'Ali drew up the agreement between them, and so he wrote: Muhammad, the Messenger of Allah. (This is followed by the same wording as we have in the previous tradition except the omission of the words: This is what he has settled)
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: 32:112