Daniel 2:47 (ESV)

47 The king answered and said to Daniel, “Truly, your God is God of gods and Lord of kings, and a revealer of mysteries, for you have been able to reveal this mystery.”

Another element that shows that the king is still thinking pagan thoughts is that he calls the Lord the God of gods. This phrase is also used in other places in the Bible. The expression is used properly when it is in the context of the Lord as the only God, when it is made clear that the named idols are nothing. For example, we encounter this expression in Deuteronomy 10:17 and Psalm 136:2. With Nebuchadnezzar, however, he seems to imply that he now regards the Lord as the supreme god, as the god who has shown that he is most powerful. He recognizes that Daniel does indeed interact with this God, but fails to acknowledge the Lord as the only God.