1 Samuel 7:4-7

So the Israelites put away their idols of Baal and Ashtoreth, and they served only the LORD. Samuel said, “All Israel must meet at Mizpah, and I will pray to the LORD for you.” So the Israelites met together at Mizpah. They drew water from the ground and poured it out before the LORD and fasted that day. They confessed, “We have sinned against the LORD.” And Samuel served as judge of Israel at Mizpah. The Philistines heard the Israelites were meeting at Mizpah, so the Philistine kings came up to attack them. When the Israelites heard they were coming, they were afraid.