Out of heaven He let you hear His voice so that He might instruct you, and on earth He showed you His great fire, and you heard His words out of the midst of the fire.
Now Mount Sinai was completely covered in smoke because the Lord had descended upon it in fire, and the smoke ascended like the smoke of a furnace, and the whole mountain shook violently.
And the Lord said to Moses, “Behold, I am coming to you in a thick cloud, so that the people may hear when I speak with you and always believe in you.” Then Moses told the words of the people to the Lord.
The glory of the Lord rested on Mount Sinai, and the cloud covered it for six days. And on the seventh day He called to Moses from the midst of the cloud.
See that you do not refuse Him who is speaking. For if they did not escape when they refused Him who spoke on earth, much less shall we escape if we turn away from Him who speaks from heaven.