Daniel 3:19-20

Then Nebuchadnezzar was filled with wrath, and his facial expression was altered toward Shadrach, Meshach and Abed-nego. He answered by giving orders to heat the furnace seven times more than it was usually heated. He commanded certain valiant warriors who were in his army to tie up Shadrach, Meshach and Abed-nego in order to cast them into the furnace of blazing fire.