2 Samuel 2:28
So Joab blew a trumpet, and all the people stood still, and pursued after Israel no more, neither fought they any more.
Nave's Topical Index—AKJV

2 Samuel 18:16
And Joab blew the trumpet, and the people returned from pursuing after Israel: for Joab held back the people.
Nave's Topical Index—AKJV

2 Samuel 20:22
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 out to Joab. And he blew a trumpet, and they retired from the city, every man to his tent. And Joab returned to Jerusalem to the king.
Nave's Topical Index—AKJV