1 Samuel 13:5-7

The Philistines assembled to fight Israel, with three thousand chariots, six thousand charioteers, and soldiers as numerous as the sand on the seashore. They went up and camped at Mikmash, east of Beth Aven. When the Israelites saw that their situation was critical and that their army was hard pressed, they hid in caves and thickets, among the rocks, and in pits and cisterns. Some Hebrews even crossed the Jordan to the land of Gad and Gilead. Saul remained at Gilgal, and all the troops with him were quaking with fear.