'Cave' in the Bible

had taken 100 prophets and had hidden them by fifties in a cave, providing them with food and water when Jezebel was trying to destroy the LORD's prophets.

Hasn't anyone told you, my master, what I did when Jezebel was killing the LORD's prophets? I hid 100 of the LORD's prophets by fifties in a cave and provided food and water for them.

Elijah arrived at a cave and stayed there. All of a sudden this message came from the LORD: "What are you doing here, Elijah?"

As soon as Elijah heard it, he covered his face in his mantle, went outside, and stood at the entrance to the cave. And there a voice spoke to him and said, "What are you doing here, Elijah?"