"Then you came near and stood at the foot of the mountain, and the mountain burned with fire to the midst of heaven, with darkness, cloud, and thick darkness.
Deuteronomy 4:11
Surrounding context
4:10 especially concerning the day you stood before the LORD your God in Horeb, when the LORD said to me, "Gather the people to Me, and I will let them hear My words, that they may learn to fear Me all the days they live on the earth, and that they may teach their children.'
4:11 "Then you came near and stood at the foot of the mountain, and the mountain burned with fire to the midst of heaven, with darkness, cloud, and thick darkness.
4:12 And the LORD spoke to you out of the midst of the fire. You heard the sound of the words, but saw no form; you only heard a voice.