Then was Nebuchadnezzar full of fury, and the form of his visage was changed against Shadrach, Meshach, and Abednego: therefore he spake, and commanded that they should heat the furnace one seven times more than it was wont to be heated.
Then Nebuchadnezzar became very angry at Shadrach, Meshach, and Abednego. So he ordered the furnace to be made much hotter than usual - seven times hotter.