1 Samuel 7:4,5

Then the children of Israel did put away Baalim, &c. Samuel's reproofs and instructions, and the representations he made of their sin and danger, touched their hearts, and induced them to break off their sins by repentance. Gather all Israel to Mizpeh, and I will pray for you He could have prayed for them himself alone in private, but he knew it would tend to perfect the repentance and reformation begun among them, and to establish them in God's service, to engage them to unite with him in that duty; and it was well worth while for them to come from the most distant part of the country to join with Samuel in seeking God's favour. Doubtless Samuel prayed both that they might, by the grace of God, be separated from their idols, and then, by the providence of God, delivered from the Philistines.