Isaiah 2:19 Men will flee to caves in the rocks and to holes in the ground from dread of the LORD and the splendor of his majesty, when He rises to shake the earth. (NIV)
Revelation 6:15 Then everyone—the kings of the earth, the rulers, the generals, the wealthy, the powerful, and every slave and free person—all hid themselves in the caves and among the rocks of the mountains. (NLT2)