At Mount Sinai
1 On the first day of the third month after the Israelites left Egypt—on that very day—they came to the Desert of Sinai.
16 On the morning of the third day there was thunder and lightning, with a thick cloud over the mountain, and a very loud trumpet blast. Everyone in the camp trembled. 17 Then Moses led the people out of the camp to meet with God, and they stood at the foot of the mountain. 18 Mount Sinai was covered with smoke, because the Lord descended on it in fire. The smoke billowed up from it like smoke from a furnace, and the whole mountain19:18 Most Hebrew manuscripts; a few Hebrew manuscripts and Septuagint and all the people trembled violently.