Exodus 14:24

14:24 In the morning watch the Lord looked down on the Egyptian army through the pillar of fire and cloud, and he threw the Egyptian army into a panic.

Exodus 19:19

19:19 When the sound of the horn grew louder and louder, Moses was speaking and God was answering him with a voice.

Exodus 20:18-21

20:18 All the people were seeing the thundering and the lightning, and heard the sound of the horn, and saw the mountain smoking – and when the people saw it they trembled with fear and kept their distance. 20:19 They said to Moses, “You speak to us and we will listen, but do not let God speak with us, lest we die.” 20:20 Moses said to the people, “Do not fear, for God has come to test you, that the fear of him may be before you so that you do not sin.” 20:21 The people kept their distance, but Moses drew near the thick darkness where God was.