16So it came about on the third day, when it was morning, that there were thunder and lightning flashes and a thick cloud upon the mountain and a very loud trumpet sound, so that all the people who were in the camp trembled. 17And Moses brought the people out of the camp to meet God, and they stood at the foot of the mountain. 18Now Mount Sinai was all in smoke because the Lord descended upon it in fire; and its smoke ascended like the smoke of a furnace, and the whole mountain quaked violently. 19When the sound of the trumpet grew louder and louder, Moses spoke and God answered him with thunder. 20The Lord came down on Mount Sinai, to the top of the mountain; and the Lord called Moses to the top of the mountain, and Moses went up. 21Then the Lord spoke to Moses, "Go down, warn the people, so that they do not break through to the Lord to gaze, and many of them perish. 22Also let the priests who come near to the Lord consecrate themselves, or else the Lord will break out against them." 23Moses said to the Lord, "The people cannot come up to Mount Sinai, for You warned us, saying, 'Set bounds about the mountain and consecrate it.'" 24Then the Lord said to him, "Go down and come up again, you and Aaron with you; but do not let the priests and the people break through to come up to the Lord, or He will break forth upon them." 25So Moses went down to the people and told them.