I Kings 19:9, 13

And there he went into a cave, and spent the night in that place; and behold, the word of the LORD came to him, and He said to him, “What are you doing here, Elijah?”

So it was, when Elijah heard it, that he wrapped his face in his mantle and went out and stood in the entrance of the cave. Suddenly a voice came to him, and said, “What are you doing here, Elijah?”