'Trumpet' in the Bible

Then Joab blew the trumpet and the army turned back from chasing Israel, for Joab had called for the army to halt.

Now a wicked man named Sheba son of Bicri, a Benjaminite, happened to be there. He blew the trumpet and said, "We have no share in David; we have no inheritance in this son of Jesse! Every man go home, O Israel!"

Then the woman went to all the people with her wise advice and they cut off Sheba's head and threw it out to Joab. Joab blew the trumpet, and his men dispersed from the city, each going to his own home. Joab returned to the king in Jerusalem.