'Den of Lions' in the Bible

All the presidents of the kingdom, the prefects and satraps, and counselors and governors, will counsel together to set up a statute of the kingdom, and to make strong an interdict that whoever shall seek a request from any God and man even to thirty days, except from thee, O king, he shall be cast into the den of lions.

At that time they drew near, and saying before the king concerning the interdict of the king, Didst thou not sign an interdict that every man that shall seek from any God and man even for thirty days, except from thee, O King, shall be cast into the den of lions? The king answered and said, The word is certain, according to the law of Media and Persia, that shall not pass away.