Hazrat Buraidah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: I passed by a square palace which had upper chambers. So I asked: Whose palace is this? It was replied: It belongs to a man from among the Arabs. Upon this I said: I am also an Arab. Whose palace is this? They said: It is for a person from the Ummah of Muhammad (peace be upon him). I said: I am Muhammad (peace be upon him) myself. Whose palace is this? They said: It is for Umar bin Khattab.