And the king cried out aloud to bring in the wise men, the Chaldeans, and the soothsayers. And the king spoke, and said to the wise men of Babylon: Whosoever shall read this writing, and shall make known to me the interpretation thereof, shall be clothed with purple, and shall have a golden chain on his neck, and shall be the third man in my kingdom.
Tertullian
Now we have to consider the mere ornaments and trappings of office. Each has its proper dress for daily and for ceremonial use. In Egypt and Babylon, the purple robe and gold necklaces were marks of rank, just as provincial priests have their golden wreaths and their robes of state.… But there was a difference in the obligation. They were conferred on men who earned the king's friendship, simply as a mark of honor.… Purple as such, then, was not yet a mark of high office among the barbarians, but of free birth. Joseph, who had been a slave, and Daniel, who had changed his status by captivity, attained citizenship of Egypt or Babylon by means of the garments that indicated free birth among the barbarians.
Imported from an open dataset — not yet checked against the printed edition.