'Blew a Trumpet' in the Bible

And there happened to be there a man of Belial, whose name was Sheba, the son of Bichri, a Benjaminite; and he blew a trumpet, and said, We have no portion in David, neither have we inheritance in the son of Jesse: every man to his tents, Israel.

Then the woman went to all the people in her wisdom. And they cut off the head of Sheba the son of Bichri, and cast it to Joab. And he blew a trumpet, and they dispersed from the city, every man to his tent. And Joab returned to Jerusalem to the king.