'Clefts' in the Bible

“Behold (listen carefully), I will send for many fishermen,” says the Lord, “and they will fish for them; and afterward I will send for many hunters, and they will hunt them from every mountain and from every hill and out of the clefts of the rocks.

“As for Your terror,The pride and arrogance of your heart have deceived you,O you who live in the clefts of the rock (Sela also called Petra),Who hold and occupy the height of the hill.Though you make your nest as high as the eagle’s,I will bring you down from there,” says the Lord.