Deuteronomy 5:22-23

22These words Jehovah spoke to all your congregation on the mountain from the midst of the fire, of the cloud, and of the obscurity, with a great voice, and he added no more; and he wrote them on two tables of stone, and gave them to me.

23And it came to pass, when ye heard the voice from the midst of the darkness, and the mountain burned with fire, that ye came near to me, all the heads of your tribes, and your elders;