Sunan an-Nasa'i, Book 48, Hadith 290 (In-Book) ⓘ
It was narrated that Hudhaifah said: "The Messenger of Allah [SAW] said: 'The Izar should come to the middle of the shins and the calf. If you insist, then a little lower, and if you insist, then a little further down, but the Izar has no right to (come to) the ankle." This is the wordings of Muhammad.
أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، وَمُحَمَّدُ بْنُ قُدَامَةَ، عَنْ جَرِيرٍ، عَنِ الأَعْمَشِ، عَنْ أَبِي إِسْحَاقَ، عَنْ مُسْلِمِ بْنِ نُذَيْرٍ، عَنْ حُذَيْفَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَوْضِعُ الإِزَارِ إِلَى أَنْصَافِ السَّاقَيْنِ وَالْعَضَلَةِ فَإِنْ أَبَيْتَ فَأَسْفَلَ فَإِنْ أَبَيْتَ فَمِنْ وَرَاءِ السَّاقِ وَلاَ حَقَّ لِلْكَعْبَيْنِ فِي الإِزَارِ " . وَاللَّفْظُ لِمُحَمَّدٍ .
also referenced under: Hadith 5329 (Reference) & Volume 6, Book 48, Hadith 5331 (DarusSalam)