'God of Gods' in the Bible

The king answered unto Daniel, and said, Of a truth your God is the God of gods, and the Lord of kings, and a revealer of secrets, seeing thou hast been able to reveal this secret.

And the king shall do according to his will; and he shall exalt himself, and magnify himself above every god, and shall speak marvellous things against the God of gods; and he shall prosper till the indignation be accomplished; for that which is determined shall be done.