1 Samuel 7:3-4, 10-11

And Samuel spake unto all the house of Israel, saying, If ye do return unto Jehovah with all your heart, then put away the foreign gods and the Ashtaroth from among you, and direct your hearts unto Jehovah, and serve him only; and he will deliver you out of the hand of the Philistines. Then the children of Israel did put away the Baalim and the Ashtaroth, and served Jehovah only.

And as Samuel was offering up the burnt-offering, the Philistines drew near to battle against Israel; but Jehovah thundered with a great thunder on that day upon the Philistines, and discomfited them; and they were smitten down before Israel. And the men of Israel went out of Mizpah, and pursued the Philistines, and smote them, until they came under Beth-car.