Sahih Muslim 191
صحيح مسلم#191Sahihوَحَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، وَزُهَيْرُ بْنُ حَرْبٍ، قَالاَ حَدَّثَنَا جَرِيرٌ، عَنِ الأَعْمَشِ، بِهَذَا الإِسْنَادِ وَلَمْ يَذْكُرْ " رَأْسُ الْكُفْرِ قِبَلَ الْمَشْرِقِ " .
Qutaiba b. Sa'id and Zubair b. Harb say:Jarir narrated this on the authority of A'mash with the same chain of narrators (as mentioned above)
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: 1:98