(4) باب مَا أَسْفَلَ مِنَ الْكَعْبَيْنِ فَهْوَ فِي النَّارِ
Narrated Abu Huraira:
The Prophet (ﷺ) said, "The part of an Izar which hangs below the ankles is in the Fire."
Reference: Sahih al-Bukhari 5787
In-book reference: Book 77, Hadith 5
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 7, Book 72, Hadith 678