Daniel 3:16-19

16Shadrach, Meshach, and Abed–nego, answered and said to the king, O Nebuchadnezzar, we are not careful to answer thee in this matter. 17If it be so, our God whom we serve is able to deliver us from the burning fiery furnace, and he will deliver us out of thine hand, O king. 18But if not, be it known unto thee, O king, that we will not serve thy gods, nor worship the golden image which thou hast set up.

19Then was Nebuchadnezzar full of fury, and the form of his visage was changed against Shadrach, Meshach, and Abed–nego: therefore he spake, and commanded that they should heat the furnace one seven times more than it was wont to be heated.1