2 Samuel 18:16
And Joab blew the trumpet, and the people returned from pursuing after Israel: for Joab held back the people.
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.
2 Samuel 20:22
Then the woman went unto 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 unto the king.
Numbers 10:2-10
Make thee two trumpets of silver; of a whole piece shalt thou make them: that thou mayest use them for the calling of the assembly, and for the journeying of the camps.
1 Corinthians 14:8
For if the trumpet give an uncertain sound, who shall prepare himself to the battle?