12 And they came and said to the king, O king, has you not made a decree, that whatever man shall ask a petition of any god or man for thirty days, but of you, O king, shall be cast into the den of lions? And the king said, The word is true, and the decree of the Medes and Persians shall not pass.
Daniel 6:12 Cross References - LXX2012
Esther 1:19
19 If then it seem good to the king, let him make a royal decree, and let it be written according to the laws of the Medes and Persians, and let him not alter [it]: and let not the queen come in to him any more; and let the king give her royalty to a woman better than she.
Daniel 3:8-12
8 Then came near [certain] Chaldeans, and accused the Jews to the king, [saying],
9 O king, live for ever.
10 You, O king, have made a decree that every man who shall hear the sound of the trumpet, and pipe, and harp, sackbut, and lute, and all kinds of music,
11 and shall not fall down and worship the golden image, shall be cast into the burning fiery furnace.
12 There are [certain] Jews whom you has appointed over the affairs of the province of Babylon, Sedrach, Misach, [and] Abdenago, who have not obeyed your decree, O king: they serve not your gods, and worship not the golden image which you have set up.
Daniel 6:8
8 Now then, O king, establish the decree, and publish a writ, that the decree of the Persians and Medes be not changed.