Exodus 19:16-18

Amplified Bible, Classic Edition

¹⁶ The third morning there were thunders and lightnings, and a thick cloud upon the mountain, and a very loud trumpet blast, so that all the people in the camp trembled.

¹⁷ Then Moses brought the people from the camp to meet God, and they stood at the foot of the mountain.

¹⁸ Mount Sinai was wrapped in smoke, for the Lord descended upon it in fire; its smoke ascended like that of a furnace, and the whole mountain quaked greatly.