Deuteronomy 5:4-6

The word of the Lord came to you face to face on the mountain, out of the heart of the fire, (I was between the Lord and you at that time, to make clear to you the word of the Lord: because, through fear of the fire, you did not go up the mountain;) saying, I am the Lord your God, who took you out of the land of Egypt, out of the prison-house.