Mishkat al-Masabih 22 Clothing كتاب اللباس 11

وَعَنْ أَبِي هُرَيْرَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَا أَسْفَلَ مِنَ الْكَعْبَيْنِ مِنَ الْإِزَارِ فِي النَّارِ» . رَوَاهُ الْبُخَارِيُّ

Abu Huraira reported God’s messenger as saying, “The part of the lower garment which goes below the ankles is in hell.” Bukhari transmitted it.