Sahih Muslim 573
صحيح مسلم#573Sahihحَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ سَلاَّمٍ الْجُمَحِيُّ، حَدَّثَنَا الرَّبِيعُ، - يَعْنِي ابْنَ مُسْلِمٍ - عَنْ مُحَمَّدٍ، - وَهُوَ ابْنُ زِيَادٍ - عَنْ أَبِي هُرَيْرَةَ، أَنَّ النَّبِيَّ صلى الله عليه وسلم رَأَى رَجُلاً لَمْ يَغْسِلْ عَقِبَيْهِ فَقَالَ " وَيْلٌ لِلأَعْقَابِ مِنَ النَّارِ " .
Abu Huraira reported:Allah's Apostle (ﷺ) saw a man who did not wash his heel and he remarked: Woe to the heels because of hell-fire
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: 2:40