The Book of Daniel, Chapter 3 (parts 1 and 2)

King Nebuchadnezzar set up a golden image in the plain of Dura (a word meaning simply "plain") and commanded that all his officials bow down before it. All who failed to do so would be thrown into a blazing furnace. Certain officials informed the king that the three Jewish youths Hanania, Mishael, and Azaria, who bore the Babylonian names Shadrach, Meshach, and Abednego, and whom the king had appointed to high office in Babylon, were refusing to worship the golden statue. The Hebrew names of Daniel's friends were Hananiah (חֲנַנְיָה), "Yah (i.e., Yahweh) is gracious", Mishael (מִישָׁאֵל), "Who is like God?" and Azariah (עֲזַרְיָה), "Yah has helped", but by the king’s decree they assigned Chaldean names, so that Hananiah became Shadrach, Mishael became Meshach and Azariah became Abednego. Shadrach's name is possibly derived from Shudur Aku "Command of Aku (the moon god)", Meshach is probably a variation of Mi-sha-aku, meaning "Who is as Aku is?", and Abednego is either "Servant of the god Nebo/Nabu" or a variation of Abednergal, "servant of the god Nergal." The three were brought before Nebuchadnezzar, where they informed the king that their God would be with them. Nebuchadnezzar commanded that they be thrown into the fiery furnace, heated seven times hotter than normal, but when the king looked he saw four figures, and not three, walking unharmed in the flames. Seeing this, Nebuchadnezzar brought the youths out of the flames and promoted them to even higher office, decreeing that any who spoke against their God should be torn limb from limb.