Deuteronomy 5:22-23

22These are the commandments the Lord spoke to your whole assembly on the mountain. He spoke in a loud voice from the fire, the cloud, and the gloomy darkness. Then he stopped speaking. He wrote the commandments on two stone tablets and gave them to me.

23But when you heard the voice coming from the darkness and saw the mountain blazing with fire, all the leaders and heads of your tribes came to me.