Bible Verses About Trumpet: Proclaiming kings

Then they hurried, and took every man his garment, and put it under him on the top of the stairs, and blew the shofar, saying, “Jehu is king.”

and she looked, and behold, the king stood by the pillar, as the tradition was, and the captains and the shofars by the king; and all the people of the land rejoiced, and blew shofars. Then Athaliah tore her clothes, and cried, “Treason! Treason!”