Daniel 6:15
Then those men came by collusion to the king and said to him, "Recall, O king, that it is a law of the Medes and Persians that no edict or decree that the king issues can be changed."
Esther 8:8
Now you write in the king's name whatever in your opinion is appropriate concerning the Jews and seal it with the king's signet ring. Any decree that is written in the king's name and sealed with the king's signet ring cannot be rescinded.
Daniel 6:12
So they approached the king and said to him, "Did you not issue an edict to the effect that for the next thirty days anyone who prays to any god or human other than to you, O king, would be thrown into a den of lions?" The king replied, "That is correct, according to the law of the Medes and Persians, which cannot be changed."
Psalm 94:20-21
Cruel rulers are not your allies, those who make oppressive laws.
Daniel 6:8
Now let the king issue a written interdict so that it cannot be altered, according to the law of the Medes and Persians, which cannot be changed.