Daniel 6:15
Then these men met before the king and said to the king, Know, O king, that the law of the Medes and Persians is that no ban nor law which the king establishes may be changed.
Esther 8:8
And you write for the Jews as it pleases you, in the king's name, and seal it with the king's ring. For the writing which is written in the king's name and sealed with the king's ring, no man may turn back.
Daniel 6:12
Then they came near and spoke before the king concerning the king's ban, Have you not signed a ban that every man who shall ask a petition of any god or man within thirty days, except of you, O king, shall be thrown into the lion's den? The king answered and said, The thing is true, according to the law of the Medes and Persians, which cannot be changed.
Psalm 94:20-21
Shall the throne of iniquity have fellowship with You, which frames mischief by a law?
Daniel 6:8
Now, O king, establish the ban and sign the writing, so that it may not be changed, according to the law of the Medes and Persians which cannot be changed.