Daniel 6:15

12 Then they came near, and spoke before the king concerning the king's decree; Hast thou not signed a decree, that every man that shall ask [a petition] of any God or man within thirty days, save of thee, O king, shall be cast into the den of lions? The king answered and said, The thing [is] true, according to the law of the Medes and Persians, which altereth not.

13 Then they answered and said before the king, That Daniel, who [is] of the children of the captivity of Judah, regardeth not thee, O king, nor the decree that thou hast signed, but maketh his petition three times a day.

14 Then the king, when he heard [these] words, was much displeased with himself, and set [his] heart on Daniel to deliver him: and he labored till the setting of the sun to deliver him.

15 Then these men assembled to the king, and said to the king, Know, O king, that the law of the Medes and Persians [is], That no decree nor statute which the king establisheth may be changed.

16 Then the king commanded, and they brought Daniel, and cast [him] into the den of lions. [Now] the king spoke and said to Daniel, Thy God whom thou servest continually, he will deliver thee.

17 And a stone was brought, and laid upon the mouth of the den; and the king sealed it with his own signet, and with the signet of his lords; that the purpose might not be changed concerning Daniel.

18 Then the king went to his palace, and passed the night fasting: neither were instruments of music brought before him: and his sleep went from him.