Daniel 6:12-13; Daniel 6:15

12 Then they icame near and said before the king, concerning the injunction, O king! Did you not sign jan injunction, that anyone who makes petition to any god or man within thirty days except to you, O king, shall be cast into the den of lions? The king answered and said, The thing stands fast, according to the law of cthe Medes and Persians, dwhich cannot be revoked. 13 Then they answered and said before the king, kDaniel, who is one lof the exiles kfrom Judah, mpays no attention to you, O king, or jthe injunction you have signed, but makes his petition gthree times a day.

15 Then these men came by agreement to the king and said to the king, Know, O king, that it is a law of the Medes and Persians that no jinjunction or ordinance that the king establishes can be changed.