Exodus 19:9
And the LORD said to Moses, Lo, I come to thee in a thick cloud, that the people may hear when I speak with thee, and believe thee for ever. And Moses told the words of the people to the LORD.And the LORD said to Moses, Lo, I come to thee in a thick cloud, that the people may hear when I speak with thee, and believe thee for ever. And Moses told the words of the people to the LORD.