Hebrews 12:18-21
12:18 For you have not come to something that can be touched, to a burning fire and darkness and gloom and a whirlwind
12:19 and the blast of a trumpet and a voice uttering words such that those who heard begged to hear no more.
12:20 For they could not bear what was commanded: “If even an animal touches the mountain, it must be stoned.”
12:21 In fact, the scene was so terrifying that Moses said, “I shudder with fear.”