1 Samuel 13:3-7

And Jonathan attacked the garrison of the Philistines that was in Geba, and the Philistines heard about it. Then Saul blew the trumpet throughout the land, saying, “Let the Hebrews hear!”

And all Israel heard the news that Saul had attacked the garrison of the Philistines, and also that Israel had become repulsive to the Philistines. Then the people were summoned to Saul at Gilgal.

Now the Philistines assembled to fight with Israel, thirty thousand chariots and six thousand horsemen, and people like the sand which is on the seashore in abundance; and they came up and camped in Michmash, east of Beth-aven.

When the men of Israel saw that they were in trouble (for the people were hard-pressed), then the people kept themselves hidden in caves, in crevices, in cliffs, in crypts, and in pits.

And some of the Hebrews crossed the Jordan into the land of Gad and Gilead. But as for Saul, he was still in Gilgal, and all the people followed him, trembling.