Daniel 6:16-17

16So the king gave the command, and they brought Daniel and cast him into the den of lions. But the king spoke, saying to Daniel, “Your God, whom you serve continually, He will deliver you.”

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