Exodus 19:17-19

Amplified Bible

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

The Lord Visits Sinai

¹⁸ Mount Sinai was wrapped in smoke because the Lord descended upon it in fire; its smoke ascended like the smoke of a furnace, and the whole mountain quaked violently. ¹⁹ And it happened, as the blast of the ram’s horn grew louder and louder, Moses spoke and God answered him with [a voice of] thunder.^(A)