Exodus 19:16-18 ▼

16 And it comes to pass, on the third day, while it is morning, that there are voices, and lightnings, and a heavy cloud on the mountain, and the sound of a very strong horn; and all the people who [are] in the camp tremble.

17 And Moses brings out the people from the camp to meet God, and they station themselves at the lower part of the mountain,

18 and Mount Sinai [is] wholly [in] smoke from the presence of YHWH, who has come down on it in fire, and its smoke goes up as smoke of the furnace, and the whole mountain trembles exceedingly;