1 Samuel 13:3-4

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, And all Israel had the news that Saul had made an attack on the Philistines, and that Israel was bitterly hated by the Philistines. And the people came together after Saul to Gilgal.