Flavius Josephus, Antiquities of the Jews
William Whiston, A.M., Ed.

[211] When Nebuchadnezzar heard this, and recollected his dream, he was astonished at the nature of Daniel, and fell upon his knee; and saluted Daniel in the manner that men worship God, and gave command that he should be sacrificed to as a god. And this was not all, for he also imposed the name, of his own god upon him, [Baltasar,] and made him and his kinsmen rulers of his whole kingdom; which kinsmen of his happened to fall into great danger by the envy and malice [of their enemies]; for they offended the king upon the occasion following: he made an image of gold, whose height was sixty cubits, and its breadth six cubits, and set it in the great plain of Babylon; and when he was going to dedicate the image, he invited the principal men out of all the earth that was under his dominions, and commanded them, in the first place, that when they should hear the sound of the trumpet, they should then fall down and worship the image; and he threatened, that those who did not so, should be cast into a fiery furnace. When therefore all the rest, upon the hearing of the sound of the trumpet, worshipped the image, they relate that Daniel's kinsmen did not do it, because they would not transgress the laws of their country. So these men were convicted, and cast immediately into the fire, but were saved by Divine Providence, and after a surprising manner escaped death, for the fire did not touch them; and I suppose that it touched them not, as if it reasoned with itself, that they were cast into it without any fault of theirs, and that therefore it was too weak to burn the young men when they were in it. This was done by the power of God, who made their bodies so far superior to the fire, that it could not consume them. This it was which recommended them to the king as righteous men, and men beloved of God, on which account they continued in great esteem with him.