And when the Philistines heard that the children of Israel were gathered together to Mizpeh, the lords of the Philistines went up against Israel. And when the children of Israel heard it, they were afraid of the Philistines.

Wesley's Notes

7:7 Went up - With an army, suspecting the effects of their general convention, and intending to nip them in the bud. Afraid - Being a company of unarmed persons, and unfit for battle. When sinners begin to repent and reform, they must expect Satan will muster all his forces against them, and set his instruments at work to the uttermost, to oppose and discourage them.

Jamieson-Fausset-Brown Bible Commentary

1Sa 7:7-14. While Samuel Prays, the Philistines Are Discomfited.

7-11. when the Philistines heard, &c.-The character and importance of the national convention at Mizpeh were fully appreciated by the Philistines. They discerned in it the rising spirit of religious patriotism among the Israelites that was prepared to throw off the yoke of their domination. Anxious to crush it at the first, they made a sudden incursion while the Israelites were in the midst of their solemn celebration. Unprepared for resistance, they besought Samuel to supplicate the divine interposition to save them from their enemies. The prophet's prayers and sacrifice were answered by such a tremendous storm of thunder and lightning that the assailants, panic-struck, were disordered and fled. The Israelites, recognizing the hand of God, rushed courageously on the foe they had so much dreaded and committed such immense havoc, that the Philistines did not for long recover from this disastrous blow. This brilliant victory secured peace and independence to Israel for twenty years, as well as the restitution of the usurped territory.

Matthew Henry's Concise Commentary

7:7-12 The Philistines invaded Israel. When sinners begin to repent and reform, they must expect that Satan will muster all his force against them, and set his instruments at work to the utmost, to oppose and discourage them. The Israelites earnestly beg Samuel to pray for them. Oh what a comfort it is to all believers, that our great Intercessor above never ceases, is never silent! for he always appears in the presence of God for us. Samuel's sacrifice, without his prayer, had been an empty shadow. God gave a gracious answer. And Samuel erected a memorial of this victory, to the glory of God, and to encourage Israel. Through successive generations, the church of God has had cause to set up Eben-ezers for renewed deliverances; neither outward persecutions nor inward corruptions have prevailed against her, because hitherto the Lord hath helped her: and he will help, even to the end of the world.