1 Samuel 13:5-7

And the Philistines mustered to fight with Israel, thirty thousand chariots and six thousand horsemen and troops like the sand on the seashore in multitude. They came up and encamped in Michmash, to the east of Beth-aven. When the men of Israel saw that they were in trouble (for the people were hard pressed), the people hid themselves in caves and in holes and in rocks and in tombs and in cisterns, and some Hebrews crossed the fords of the Jordan to the land of Gad and Gilead. Saul was still at Gilgal, and all the people followed him trembling.