2 Samuel 18:16
And Joab blew the trumpet, and the people returned from pursuing after Israel: for Joab held back the people.
Cross-reference
2 Samuel 2:28
Parallel
In 2 Samuel 2:28, Joab similarly blows a trumpet to stop the pursuit after a rebel leader's death.
2 Samuel 20:22
Parallel
In 2 Samuel 20:22, Joab again blows a trumpet to disperse the city after Sheba's death.
Numbers 10:2–10
Historical context
Numbers 10:2-10 gives the law for silver trumpets to signal assemblies and war, establishing the practice Joab follows.