Sahih Muslim 1113
صحيح مسلم#1113Sahihحَدَّثَنَا زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يَزِيدَ، أَخْبَرَنَا سَعِيدُ بْنُ أَبِي أَيُّوبَ، عَنْ أَبِي الأَسْوَدِ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ، أَنَّهَا قَالَتْ سُئِلَ رَسُولُ اللَّهِ صلى الله عليه وسلم عَنْ سُتْرَةِ الْمُصَلِّي فَقَالَ " مِثْلُ مُؤْخِرَةِ الرَّحْلِ " .
A'isha reported:The Messenger of Allah (ﷺ) was asked about sutra of a worshipper; he said: Equal to the back of the saddle
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: 4:275