'Rocks' in the Bible

At the sound of the horseman and bowman every city flees;They go into the thickets and climb among the rocks;Every city is forsaken,And no man dwells in them.

“Behold, I am going to send for many fishermen,” declares the Lord, “and they will fish for them; and afterwards I will send for many hunters, and they will hunt them from every mountain and every hill and from the clefts of the rocks.