Exodus 19:5-9

Now therefore, if you will indeed obey My voice and keep My covenant, then you shall be a special treasure to Me above all people; for all the earth is Mine. And you shall be to Me a kingdom of priests and a holy nation.’ These are the words which you shall speak to the children of Israel.” So Moses came and called for the elders of the people, and laid before them all these words which the LORD commanded him. Then all the people answered together and said, “All that the LORD has spoken we will do.” So Moses brought back the words of the people to the LORD. And the LORD said to Moses, “Behold, I come to you in the thick cloud, that the people may hear when I speak with you, and believe you forever.” So Moses told the words of the people to the LORD.