He let them go, to wit, successively at several times, and in divers places, with great care and discretion, so as they might not hinder one another, nor all run into the same field; but being dispersed in all parts, might spread the plague further; and withal might be kept at a distance from the fields and vineyards of the Israelites. It is not worthy of our inquiry what became of these foxes afterward, whether they were burnt by the firebrands, or run into holes, or were taken and killed by the Philistines. The truth of this history is notably attested by a custom of the Romans, which it is very probable they had from the Phoenicians, upon this occasion; for every year they had a solemnity in April, the very time of Canaan's wheat harvest, wherein foxes were let loose with burning torches fastened to their backsides, &c.
Related Commentaries of Judges 15:5
Judges 15:5
5 And when he had set the brands on fire, he let them go into the standing corn of the Philistines, and burnt up both the shocks, and also the standing corn, with the vineyards and olives.