'Great King' in the Bible

And Rabshakeh said unto them, Pray you say unto Hezekiah, - Thus, saith the great king, the king of Assyria, What is this trust, wherewith then dost trust?

So then Rabshakeh took his stand, and cried out with a loud voice, in the Jews language, and said, Hear ye the words of the great king, the king of Assyria: