Exodus 19:18-20

MKJV(i) 18 And Mount Sinai was smoking, all of it, because Jehovah came down upon it in fire. And the smoke of it went up like the smoke of a furnace, and the whole mountain quaked greatly. 19 And when the voice of the trumpet sounded long, and became very strong, Moses spoke, and God answered him by a voice. 20 And Jehovah came down upon Mount Sinai, on the top of the mountain. And Jehovah called Moses to the top of the mountain, and Moses went up.