'King of Kings' in the Bible

“Artaxerxes, king of kings, to Ezra the priest, the scribe of the law of the God of heaven, perfect peace. And now

For thus says the Lord God, “Behold, I will bring upon Tyre from the north Nebuchadnezzar king of Babylon, king of kings, with horses, chariots, cavalry and a great army.

You, O king, are the king of kings, to whom the God of heaven has given the kingdom, the power, the strength and the glory;

which He will bring about at the proper time—He who is the blessed and only Sovereign, the King of kings and Lord of lords,

These will wage war against the Lamb, and the Lamb will overcome them, because He is Lord of lords and King of kings, and those who are with Him are the called and chosen and faithful.”

And on His robe and on His thigh He has a name written, “KING OF KINGS, AND LORD OF LORDS.”