'Hidden' in the Bible

He that has an ear, let him hear what the Spirit says to the assemblies. To him that overcomes, to him will I give of the hidden manna; and I will give to him a white stone, and on the stone a new name written, which no one knows but he that receives it.

and they say to the mountains and to the rocks, Fall on us, and have us hidden from the face of him that sits upon the throne, and from the wrath of the Lamb;