2 Kings 1:9-11

9Then the king sent to him a captain of fifty men with his fifty. He went up to Elijah, who was sitting on the top of a hill, and said to him, "O man of God, the king says, 'Come down.'"

10But Elijah answered the captain of fifty, "If I am a man of God, let fire come down from heaven and consume you and your fifty." Then fire came down from heaven and consumed him and his fifty.

11Again the king sent to him another captain of fifty men with his fifty. And he answered and said to him, "O man of God, this is the king's order, 'Come down quickly!'"