Daniel 6:12 YLT

[12] then they have come near, yea, they are saying before the king concerning the king's interdict: `Hast thou not signed an interdict, that any man who seeketh from any god and man until thirty days, save of thee, O king, is cast into a den of lions?' Answered hath the king, and said, `The thing [is] certain as a law of Media and Persia, that doth not pass away.'