What teaching of the Prophet Muhammad (saw) states that the most awful (meanest) name in Allah's sight is that of a man calling himself King of Kings?
 Narrated Abu Huraira:                     The Prophet said, "The most awful (meanest) name in Allah's sight." Sufyan said more than once, "The most awful (meanest) name in Allah's sight is (that of) a man calling himself king of kings." Sufyan said, "Somebody else (i.e. other than Abu Az-Zinad, a sub-narrator) says: What is meant by 'The king of kings' is 'Shahan Shah.,"