'Den of Lions' in the Bible

To all the supervisors of the kingdom, the prefects, satraps, counselors, and governors it seemed like a good idea for a royal edict to be issued and an interdict to be enforced. For the next thirty days anyone who prays to any god or human other than you, O king, should be thrown into a den of lions.

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."

So the king gave the order, and Daniel was brought and thrown into a den of lions. The king consoled Daniel by saying, "Your God whom you continually serve will rescue you!"