"While I was sleeping I saw people presented before me, and that they were wearing shirts. Some of them (the shirts) reaching their breasts, and some of them reaching below that." He said: "Then 'Umar was presented before me and he was wearing a shirt that was dragging." They said: "How did you interpret that O Messenger of Allah?" He said: "The religion."
Jami` at-Tirmidhi Book 34, Hadith 16