Exodus 19:3-9

3And Moses went up to 1God, and Jehovah called to him out of the mountain, saying, Thus shalt thou say to the house of Jacob, and tell the children of Israel:

4Ye have seen what I have done to the Egyptians, and [how] I have borne you on eagles' wings and brought you to myself.

5And now, if ye will hearken to my voice indeed and keep my covenant, then shall ye be my own possession out of all the peoples — for all the earth is mine —

6and ye shall be to me a kingdom of priests, and a holy nation. These are the words which thou shalt speak to the children of Israel.

7And Moses came and called the elders of the people, and laid before them all these words which Jehovah had commanded him.

8And all the people answered together, and said, All that Jehovah has spoken will we do! And Moses brought the words of the people back to Jehovah.

9And Jehovah said to Moses, Lo, I will come to thee in the cloud's thick darkness, that the people may hear when I speak with thee, and believe thee also for ever. And Moses told the words of the people to Jehovah.