It is narrated from Hazrat Abu Saeed Khudri (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: Once I was sleeping and I saw in a dream that people were being presented before me and they were wearing shirts, but some people's shirts reached their chests and some were lower than that. When Umar bin Khattab (may Allah be pleased with him) passed by me, the shirt he was wearing was dragging on the ground. The companions (may Allah be pleased with them) asked the Prophet (peace and blessings be upon him), "O Messenger of Allah (peace and blessings be upon him), what interpretation did you give to this?" The Prophet (peace and blessings be upon him) said: Religion.