Trumpet used at Mount Sinai
Source: Nav
Exodus 19:13–19
No hand shall touch him, but he shall surely be stoned or shot with arrows—whether man or beast, he must not live.’ Only when the ram’s horn sounds a long blast may they approach the mountain.” / When Moses came down from the mountain to the people, he consecrated them, and they washed their clothes. / “Be prepared for the third day,” he said to the people. “Do not draw near to a woman.”
Exodus 20:18
When all the people witnessed the thunder and lightning, the sounding of the ram’s horn, and the mountain enveloped in smoke, they trembled and stood at a distance.
Hebrews 12:19
to a trumpet blast or to a voice that made its hearers beg that no further word be spoken.