Daniel 6:10, 12

Even after Daniel learned that the king had officially signed his decree, he continued his regular custom of praying at three set times a day. He went to the upper chamber of his house and opened the windows facing toward Jerusalem. Then he got down on his knees to pray, and he offered his grateful praise to God as he always had done.

So they approached the king and reminded him of his royal decree: “Your Majesty, did you not sign a decree forbidding everyone for thirty days to pray to any god or man except to you, O king, under penalty of being thrown into the lions’ den?” “Yes, I did, and my decree is final,” the king answered. “It is irrevocable according to the law of the Medes and Persians.”