Bible Verses About Persia: Government of, restricted by constitutional limitations

You should issue a decree in the king's name for whatever you want concerning the Jews, and seal it with the king's signet ring; because a decree written in the king's name and sealed with the king's ring can't be rescinded by anyone."

Now, your majesty, issue this decree over your signature, so that it cannot be revoked, as required by the law of the Medes and Persians, which is itself irrevocable."

So King Daryavesh signed the document, and the decree became law.

On learning that the document had been signed, Dani'el went home. The windows of his upstairs room were open in the direction of Yerushalayim; and there he kneeled down three times a day and prayed, giving thanks before his God, just as he had been doing before.

Then these men descended on Dani'el and found him making requests and pleading before his God.

So they went to remind the king of his royal decree: "Didn't you sign a law prohibiting anyone from making requests of any god or man within thirty days, except yourself, your majesty, on pain of being thrown into the lion pit?"The king answered, "Yes, that is true, as required by the law of the Medes and Persians, which is itself irrevocable."