Thematic Bible: Decrees of, irrevocable

Now you write to the Jews as you see fit, in the king’s name, and seal it with the king’s signet ring; for a decree which is written in the name of the king and sealed with the king’s signet ring may not be revoked.” Verse ConceptsSealing The Message

Then they approached and spoke before the king about the king's injunction, "Did you not sign an injunction that any man who makes a petition to any god or man besides you, O king, for thirty days, is to be cast into the lions' den?" The king replied, "The statement is true, according to the law of the Medes and Persians, which may not be revoked." Then they answered and spoke before the king, "Daniel, who is one of the exiles from Judah, pays no attention to you, O king, or to the injunction which you signed, but keeps making his petition three times a day." Then, as soon as the king heard this statement, he was deeply distressed and set his mind on delivering Daniel; and even until sunset he kept exerting himself to rescue him. read more.
Then these men came by agreement to the king and said to the king, "Recognize, O king, that it is a law of the Medes and Persians that no injunction or statute which the king establishes may be changed."

"Now, O king, establish the injunction and sign the document so that it may not be changed, according to the law of the Medes and Persians, which may not be revoked." Therefore King Darius signed the document, that is, the injunction.