The book of Daniel includes the story of Daniel in the den of lions.
In 605 B.C., when the Babylonians conquered Israel, they took many young men into captivity, one of whom was Daniel. He lived in the pagan kingdom of Babylon in captivity until his 80s. Through obedience to God, his Creator, and an impecible reputation of honesty and hard work, Daniel had succeeded in becoming a political administrator, much to the jealous dismay of the other government officials.
The other politicians tricked King Darius into passing a decree that anyone who prayed to another god or man besides the king during the next 30 days would be thrown into a lions' den. Daniel knew this but still went home, knelt down, faced Jerusalem, and prayed to his Creator. The other administrators informed the king. King Darius loved Daniel but was forced to have Daniel thrown into the lions' den.
The king ran to see Daniel the next morning. Daniel told him, "My God sent his angel, and he shut the mouths of the lions. They have not hurt me, because I was found innocent in his sight. Nor have I ever done any wrong before you, O king." (Daniel 6:22) The king was greatly relieved, and Daniel was brought out of the den unharmed.
King Darius had the other politicians, their wives, and their children all thrown into the lions' den, where they were immediately eaten. Then the king issued another decree ordering the people to pray to Daniel's God.
Daniel's story is much like that of Our Lord and Savior Jesus Christ. He is unbending in his faith, despite the threat of death. When he is put in the den under circumstances much like Jesus' trial before Pilate, he faces what appears to be guaranteed death. The Creator watches over him, however, and he is released from the den much like Jesus emerges from the tomb during the resurrection. Are you at the mouth of the lions' den yourself, trying to maintain your faith? Hopefully this story will be an inspiration to you.