Deuteronomy 5:22-23

22These words Jehovah spake unto all your assembly in the mount out of the midst of the fire, of the cloud, and of the thick darkness, with a great voice: and he added no more. And he wrote them upon two tables of stone, and gave them unto me. 23And it came to pass, when ye heard the voice out of the midst of the darkness, while the mountain was burning with fire, that ye came near unto me, even all the heads of your tribes, and your elders;