Hebrews 12:18-21

For ye are not come unto the mount that might be touched, and that burned with fire, nor unto blackness, and darkness, and tempest, and the sound of a trumpet, and the voice of words; which voice they that heard intreated that the word should not be spoken to them any more: (for they could not endure that which was commanded, And if so much as a beast touch the mountain, it shall be stoned, or thrust through with a dart: and so terrible was the sight, that Moses said, I exceedingly fear and quake:)