1 Samuel 7:2-6

From the time that the Chest came to rest in Kiriath Jearim, a long time passed—twenty years it was—and throughout Israel there was a widespread, fearful movement toward GOD. Then Samuel addressed the house of Israel: “If you are truly serious about coming back to GOD, clean house. Get rid of the foreign gods and fertility goddesses, ground yourselves firmly in GOD, worship him and him alone, and he’ll save you from Philistine oppression.” They did it. They got rid of the gods and goddesses, the images of Baal and Ashtoreth, and gave their exclusive attention and service to GOD. Next Samuel said, “Get everybody together at Mizpah and I’ll pray for you.” So everyone assembled at Mizpah. They drew water from the wells and poured it out before GOD in a ritual of cleansing. They fasted all day and prayed, “We have sinned against GOD.” So Samuel prepared the Israelites for holy war there at Mizpah.