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

[195] Now two years after the destruction of Egypt, king Nebuchadnezzar saw a wonderful dream, the accomplishment of which God showed him in his sleep; but when he arose out of his bed, he forgot the accomplishment. So he sent for the Chaldeans and magicians, and the prophets, and told them that he had seen a dream, and informed them that he had forgotten the accomplishment of what he had seen, and he enjoined them to tell him both what the dream was, and what was its signification; and they said that this was a thing impossible to be discovered by men; but they promised him, that if he would explain to them what dream he had seen, they would tell him its signification. Hereupon he threatened to put them to death, unless they told him his dream; and he gave command to have them all put to death, since they confessed they could not do what they were commanded to do. Now when Daniel heard that the king had given a command, that all the wise men should be put to death, and that among them himself and his three kinsmen were in danger, he went to Arioch, who was captain of the king's guards, and desired to know of him what was the reason why the king had given command that all the wise men, and Chaldeans, and magicians should be slain. So when he had learned that the king had had a dream, and had forgotten it, and that when they were enjoined to inform the king of it, they had said they could not do it, and had thereby provoked him to anger, he desired of Arioch that he would go in to the king, and desire respite for the magicians for one night, and to put off their slaughter so long, for that he hoped within that time to obtain, by prayer to God, the knowledge of the dream. Accordingly, Arioch informed the king of what Daniel desired. So the king bid them delay the slaughter of the magicians till he knew what Daniel's promise would come to; but the young man retired to his own house, with his kinsmen, and besought God that whole night to discover the dream, and thereby deliver the magicians and Chaldeans, with whom they were themselves to perish, from the king's anger, by enabling him to declare his vision, and to make manifest what the king had seen the night before in his sleep, but had forgotten it. Accordingly, God, out of pity to those that were in danger, and out of regard to the wisdom of Daniel, made known to him the dream and its interpretation, that so the king might understand by him its signification also. When Daniel had obtained this knowledge from God, he arose very joyful, and told it his brethren, and made them glad, and to hope well that they should now preserve their lives, of which they despaired before, and had their minds full of nothing but the thoughts of dying. So when he had with them returned thanks to God, who had commiserated their youth, when it was day he came to Arioch, and desired him to bring him to the king, because he would discover to him that dream which he had seen the night before.