Daniel 6:12

And they came and spoke to the king concerning the edict: O king, hast thou not decreed, that every man that should make a request to any of the gods, or men, for thirty days, but to thyself, O king, should be cast into the den of the lions? And the king answered them, saying: The word is true, according to the decree of the Medes and Persians, which it is not lawful to violate.