ENOfficial
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.
Source: sunnah.com
Other translations
Arabic
وَعَنْ أَبِي هُرَيْرَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَا أَسْفَلَ مِنَ الْكَعْبَيْنِ مِنَ الْإِزَارِ فِي النَّارِ» . رَوَاهُ الْبُخَارِيُّ
sunnah.com