'Cave' in the Bible

For it was so, when Jezebel cut off the prophets of the LORD, that Obadiah took an hundred prophets, and hid them by fifty in a cave, and fed them with bread and water.)

Was it not told my lord what I did when Jezebel slew the prophets of the LORD, how I hid an hundred men of the LORD'S prophets by fifty in a cave, and fed them with bread and water?

And he came thither unto a cave, and lodged there; and, behold, the word of the LORD came to him, and he said unto him, What doest thou here, Elijah?

And it was so, when Elijah heard it, that he wrapped his face in his mantle, and went out, and stood in the entering in of the cave. And, behold, there came a voice unto him, and said, What doest thou here, Elijah?