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.
Daniel 3:19
Surrounding context
3:18 But if not, let it be known to you, O king, that we do not serve your gods, nor will we worship the gold image which you have set up."
3:19 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.
3:20 And he commanded certain mighty men of valor who were in his army to bind Shadrach, Meshach, and Abed-Nego, and cast them into the burning fiery furnace.