Exodus 19:16 - 19:25
16 So it happened 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. 17 And Moses brought the people out of the camp to meet God, and they stood at the foot of the mountain.
Yahweh Descends on Mount Sinai18 Now Mount Sinai was all in smoke because Yahweh descended upon it in fire; and its smoke ascended like the smoke of a furnace, and the whole mountain trembled violently. 19 And the sound of the trumpet grew louder and louder; then Moses spoke and God answered him with thunder. 20 And Yahweh came down on Mount Sinai, to the top of the mountain; and Yahweh called Moses to the top of the mountain, and Moses went up. 21 Then Yahweh spoke to Moses, “Go down, warn the people, lest they break through to Yahweh to see, and many of them perish. 22 Also let the priests who come near to Yahweh set themselves apart as holy, lest Yahweh break out against them.” 23 And Moses said to Yahweh, “The people cannot come up to Mount Sinai, for You warned us, saying, ‘Set bounds about the mountain, and set it apart as holy.’” 24 Then Yahweh 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 Yahweh, lest He break out against them.” 25 So Moses went down to the people and told them.