Bede

The Philistines had gone up to Jezreel. When David departed with his men, the Philistines went up to Jezreel, that is, to combat in the seed of God, where they had previously assembled in Aphek, that is, in the new wrath. And the reprobates often, having driven away the stronger doctors of the Church from their proximity, exert all their strength to corrupt the weaker ones, whom, out of respect or fear of the former, although raging in spirit, they had previously not presumed to touch and disturb. …

Commentary on Samuel ↗