Exodus 19:9
9 And the Lord said to Moses, “Behold, I am coming to you bin a thick cloud, that cthe people may hear when I speak with you, and may also dbelieve you forever.”
When Moses told the words of the people to the Lord,
Exodus 19:16
16 On the morning of the kthird day there were mthunders and lightnings and na thick cloud on the mountain and a very loud otrumpet blast, so that all the people in the camp ptrembled.
Hebrews 12:18–19
A Kingdom That Cannot Be Shaken
18 For you have not come to zwhat may be touched, a blazing fire and darkness and gloom and a tempest 19 and athe sound of a trumpet and a voice whose words bmade the hearers beg that no further messages be spoken to them.