'Clefts of the Rock' in the Bible

Behold, I will send for many fishermen, says LORD, and they shall fish them up. And afterward I will send for many hunters, and they shall hunt them from every mountain, and from every hill, and out of the clefts of the rocks.

As for thy formidableness, the pride of thy heart has deceived thee, O thou who dwells in the clefts of the rock, who holds the height of the hill. Though thou should make thy nest as high as the eagle, I will bring thee down from