عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ إِزْرَةُ الْمُؤْمِنِ إِلَى عَضَلَةِ سَاقَيْهِ ثُمَّ إِلَى نِصْفِ سَاقَيْهِ ثُمَّ إِلَى كَعْبَيْهِ فَمَا كَانَ أَسْفَلَ مِنْ ذَلِكَ فِي النَّارِ
Syedna Abu Hurairah (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: The lower garment of a believer should be up to the calf of his leg, or he may make it up to the middle of the calf, otherwise up to the ankles; whatever is below that is in the Fire.