Daniel 6:7-9

7All the governors of the kingdom, the administrators and satraps, the counselors and advisors, have consulted together to establish a royal statute and to make a firm decree, that whoever petitions any god or man for thirty days, except you, O king, shall be cast into the den of lions.

8Now, O king, establish the decree and sign the writing, so that it cannot be changed, according to the law of the Medes and Persians, which does not alter.”

9Therefore King Darius signed the written decree.