John Gill Commentary 1 Samuel 17:53

"And the children of Israel returned from chasing after the Philistines, and they plundered their camp." — 1 Samuel 17:53 (ASV)

And the children of Israel returned from chasing after the
Philistines
The remainder that escaped having got into their fortified cities:

and they spoiled their tents ;
which they left in their camp, all their armour, goods, money, and provisions, they found there, they seized upon as their prey and booty; these they did not stay to meddle with as soon as the Philistines fled, but first pursued them, and slew as many of them as they could, and then returned to the spoil; which was wisely done.