2 Samuel 18:16
Then Joab blew the trumpet and the army turned back from chasing Israel, for Joab had called for the army to halt.
2 Samuel 2:28
Then Joab blew the ram's horn and all the people stopped in their tracks. They stopped chasing Israel and ceased fighting.
2 Samuel 20:22
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.
Numbers 10:2-10
"Make two trumpets of silver; you are to make them from a single hammered piece. You will use them for assembling the community and for directing the traveling of the camps.
1 Corinthians 14:8
If, for example, the trumpet makes an unclear sound, who will get ready for battle?