Sahih Muslim 200
صحيح مسلم#200Sahihحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، وَزُهَيْرُ بْنُ حَرْبٍ، وَابْنُ، نُمَيْرٍ قَالُوا حَدَّثَنَا سُفْيَانُ، عَنْ زِيَادِ بْنِ عِلاَقَةَ، سَمِعَ جَرِيرَ بْنَ عَبْدِ اللَّهِ، يَقُولُ بَايَعْتُ النَّبِيَّ صلى الله عليه وسلم عَلَى النُّصْحِ لِكُلِّ مُسْلِمٍ .
(Sufyan narrated on the authority of Ziyad b. 'Ilaqa that he heard Jarir b. 'Abdullah saying:I pledged allegiance to the Messenger of Allah may peace and blessings be upon him) on sincerity and well-wishing for every Muslim
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: 1:107