“All of Mount Sinai smoked, because Yahweh descended on it in fire; and its smoke ascended like the smoke of a furnace, and the whole mountain quaked greatly.”
Exodus 19:18 (WEB)
Context Reading
16On the third day, when it was morning, there were thunders and lightnings, and a thick cloud on the mountain, and the sound of an exceedingly loud trumpet; and all the people who were in the camp trembled. 17Moses led the people out of the camp to meet God; and they stood at the lower part of the mountain. 18All of Mount Sinai smoked, because Yahweh descended on it in fire; and its smoke ascended like the smoke of a furnace, and the whole mountain quaked greatly. 19When the sound of the trumpet grew louder and louder, Moses spoke, and God answered him by a voice. 20Yahweh came down on Mount Sinai, to the top of the mountain. Yahweh called Moses to the top of the mountain, and Moses went up.