"The Messenger of Allah ﷺ took hold of the calf of my shin - or his shin - and he said: "This is the place of the Izar, if you must lower it, then the Izar has no right to be on the ankles." (Using translation from Tirmidhī 1783)
أَخَذَ رَسُولُ اللهِ ﷺ بِعَضَلَةِ سَاقِي فَقَالَ هَذَا مَوْضِعُ الْإِزَارِ فَإِنْ أَبَيْتَ فَأَسْفَلُ مِنْ ذَلِكَ فَإِنْ أَبَيْتَ فَلَا حَقَّ لِلْإِزَارِ فِي الْكَعْبَيْنِ