פירוש על דברי הימים א 12:20

And from Manasseh there defected to David to help him.

when he came with the Philistines against Saul in battle in that war in which Saul was slain.

but they did not help them God forbid that they helped the Philistines, but with a counsel the chiefs of the Philistines sent him away. The chiefs of the Philistines took counsel to send him home because they said, “With our heads he will defect to his master,” an expression similar to “defected to David”