It is narrated from Sayyiduna Ali (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Four things have been given to me which were not given to any prophet before me: the treasures of the earth have been given to me, my name has been kept Ahmad, the earth has been made a purifier for me like water, and my Ummah has been given the title of the best Ummah."