Deuteronomy 4
10 Ref That day when you were waiting before the Lord your God in Horeb, and the Lord said to me, Make all the people come together, so that hearing my words they may go in fear of me all the days of their life on earth and give this teaching to their children.
11 Ref And you came near, waiting at the foot of the mountain; and flames of fire went up from the mountain to the heart of heaven, with dark clouds, and all was black as night.
12 Ref And the voice of the Lord came to you out of the fire: the sound of his words came to your ears but you saw no form; there was nothing but a voice.
13 Ref And he gave you his agreement with you, the ten rules which you were to keep, which he put in writing on the two stones of the law.