I Samuel 7:4-7

So the children of Israel put away the Baals and the Ashtoreths, and served the LORD only. And Samuel said, “Gather all Israel to Mizpah, and I will pray to the LORD for you.” So they gathered together at Mizpah, drew water, and poured it out before the LORD. And they fasted that day, and said there, “We have sinned against the LORD.” And Samuel judged the children of Israel at Mizpah. Now when the Philistines heard that the children of Israel had gathered together at Mizpah, the lords of the Philistines went up against Israel. And when the children of Israel heard of it, they were afraid of the Philistines.