'Horn' in the Bible

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."

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.

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

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.