Exodus 19:19
When the sound of the horn grew louder and louder, Moses was speaking and God was answering him with a voice.
Psalm 81:7
In your distress you called out and I rescued you. I answered you from a dark thundercloud. I tested you at the waters of Meribah. (Selah)
Exodus 19:16
On the third day in the morning there was thunder and lightning and a dense cloud on the mountain, and the sound of a very loud horn; all the people who were in the camp trembled.
Exodus 19:13
No hand will touch him -- but he will surely be stoned or shot through, whether a beast or a human being; he must not live.' When the ram's horn sounds a long blast they may go up on the mountain."
Nehemiah 9:13
"You came down on Mount Sinai and spoke with them from heaven. You provided them with just judgments, true laws, and good statutes and commandments.
Hebrews 12:21
In fact, the scene was so terrifying that Moses said, "I shudder with fear."