It is narrated from Sayyiduna Khuraym bin Fatik (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "What a fine young man Khuraym is, if only he would shorten his hair and raise his lower garment." The narrator says: At this Khuraym (may Allah be pleased with him) said: "(From now on) my hair will not go beyond my ears, nor will my lower garment go beyond my heels."
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 4146