Abu Huraira reported Allah's Messenger ﷺ as saying: The vilest name in Allah's sight is Malik al-Amidh (King of Kings). The narration transmitted on the authority of Shaiba (contains these words): There is no king but Allah, the Exalted and Glorious. Sufyan said: Similarly, the word Shahinshah (is also the vilest appellation). Ahmad b. Hanbal said: I asked Abu 'Amr about the meaning of Akhna. He said: The vilest.
This hadith also teaches us about humility and modesty; it reminds us to be humble before God and not think too highly of ourselves or others around us. We should never forget that only God has ultimate power over all things, so we must always show respect for Him by using His proper titles when referring to Him or speaking about Him.