Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "Chosroes will perish, and after him there will be no Chosroes, for he used to say: I am the 'King of Kings'. Caesar will perish, and after him there will be no Caesar, for he says: I am the 'King of Kings'."
Imam al-Tabarani recorded it in al-Mu'jam al-Awsat, and its narrators are the narrators of the "Sahih".