2 Samuel 18:16
And Joab blew the ram's horn, and the people returned from pursuing Israel. For Joab held back the people.
2 Samuel 2:28
And Joab blew a ram's horn, and all the people stood still and did not pursue after Israel any more, nor did they fight any more.
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 threw it out to Joab. And he blew the ram's horn, and they scattered from the city, each man to his tent. And Joab returned to Jerusalem to the king.
Numbers 10:2-10
Make two trumpets of silver for yourself. You shall make them of beaten work. And they shall be used for the calling of the assembly and for causing the camps to go forward.
1 Corinthians 14:8
For also if a trumpet gives an uncertain sound, who shall prepare himself for the battle?