I Samuel 13:3

3 Jonathan attacked the Philistine outpost at Geba, and the Philistines heard about it. Then Saul had the trumpet blown throughout the land and said, "Let the Hebrews hear!"

3 And Jonathan made an attack on the armed force of the Philistines stationed at Gibeah; and news was given to the Philistines that the Hebrews were turned against them. And Saul had a horn sounded through all the land,