'Cave' in the Bible

So David departed from there and escaped to the cave of Adullam; and when his brothers and all his father’s house heard about it, they went down there to him.

On the way he came to the sheepfolds where there was a cave; and Saul went in to relieve himself. Now David and his men were sitting in the cave’s innermost recesses.

So David strongly rebuked his men with these words and did not let them rise up against Saul. Saul got up, left the cave and went on his way.

Then David also got up afterward and went out of the cave and called after Saul, saying, “My lord the king!” And when Saul looked behind him, David bowed with his face to the ground and lay himself face down.

Behold, your eyes have seen today how the Lord had given you into my hand in the cave. Some told me to kill you, but I spared you; I said, ‘I will not reach out my hand against my lord, for he is the Lord’s anointed.’