Exodus 19:18 ASV

¹⁶  And it came to pass on the third day, when it was morning, that there were thunders and lightnings, and a thick cloud upon the mount, and the voice of a trumpet exceeding loud; and all the people that were in the camp trembled.

¹⁷  And Moses brought forth the people out of the camp to meet God; and they stood at the nether part of the mount.

¹⁸  And mount Sinai, the whole of it, smoked, because Jehovah descended upon it in fire; and the smoke thereof ascended as the smoke of a furnace, and the whole mount quaked greatly.

¹⁹  And when the voice of the trumpet waxed louder and louder, Moses spake, and God answered him by a voice.

²⁰  And Jehovah came down upon mount Sinai, to the top of the mount: and Jehovah called Moses to the top of the mount; and Moses went up.