Exodus 19:9 in the King James Version
And the LORD said unto Moses, Lo, I come unto 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 unto the LORD.
Context
8 All the people answered together, and said, “All that the LORD has spoken we will do.” Moses reported the words of the people to the LORD.
9 The LORD said to Moses, “Behold, I come to you in a thick cloud, that the people may hear when I speak with you, and may also believe you forever.” Moses told the words of the people to the LORD.
10 The LORD said to Moses, “Go to the people, and sanctify them today and tomorrow, and let them wash their garments,