1 Samuel 7:13
So the Philistines were subdued, and they came no more into the coast of Israel: and the hand of the LORD was against the Philistines all the days of Samuel. So the Philistines were subdued, and they came no more into the coast of Israel: and the hand of the LORD was against the Philistines all the days of Samuel.
After God delivered Israel, the Philistines were brought low, surrendering the fortified places they had seized from Israel and holding back from further attacks for many years. The peace that followed continued unbroken until the end of Samuel's period as sole leader. In this, obedience to God is shown to bring security and well-being, while disobedience brings ruin and overthrow.