Daniel 3:19, 25

Then Nebuchadnezzar was full of fury, and the expression on his face changed toward Shadrach, Meshach, and Abed-Nego. He spoke and commanded that they heat the furnace seven times more than it was usually heated.

“Look!” he answered, “I see four men loose, walking in the midst of the fire; and they are not hurt, and the form of the fourth is like the Son of God.”