Judg 15:4

“Just as those who travel about in the pathless desert tremble at serpents on the ground, and those who travel on the pathways are also terrified of vipers that hide on the paths, so were the Philistines, who traveled on paths and in the pathless desert, terrified of Samson. "To bite the horse's heels and throw its rider backward." It was during the great famine, which God had brought upon the Philistines, that Samson burned their crops by means of foxes, for fire was carried on their bodies like a rider on its horse. Then the Philistines keeled over from lack of bread and then fell backwards from lack of nourishment.”

“Wherefore he took three hundred foxes, and in the heat of summer, when the corn was now ripe in the fields, he tied them together two and two by the tails, and fastened a burning firebrand between them, binding it with a firm knot, and by way of avenging his wrong turned them loose among the sheaves which the Philistines had cut. But the foxes, terrified by the fire, scattered flames whichever way they turned, and burnt the harvest.”

“Samson resistless because of his hair is attacked by a lion; When he killed the wild beast, from its mouth there flowed streams of honey, And from an ass's jawbone comes forth a fountain of water: Folly with water overflows and virtue with sweetness. Samson catches three hundred foxes and arms them with firebrands, Which he ties to their tails, and he lets them go into the cornfields Of the Philistines to burn their crops: thus the fox of false doctrine Cunningly scatters the flames of heresy over our vineyards.”

“Let us avoid, then, brothers, let us avoid the pestilential deceits of the insidious foxes [heretics]. Let us avoid the deadly frauds of wicked persons lest, like the foxes which that famous strong man Samson once sent into the Philistines' fields, bearing torches on their tails that burned up everything with their flames, the foxes of perverse teachings in like manner either get hold of the fruits of our fields by deceitful traps or consume them by burning flames. Let us, therefore, as we read, be simple and clever—that is to say, simple as doves and clever as serpents, so that the cleverness of the serpents might protect the simplicity of the doves.”

“Now let us see what Samson did when he was injured by his friend in the person of his wife. He took foxes, that is, adulterous friends of whom it is said in the Canticle of Canticles, "Catch us the foxes, the little foxes that damage the vineyards." What does it mean, "catch"? It means seize, convict, repress them, lest the vines of the church be destroyed. What else does it mean to catch foxes, except to convict heretics with the authority of the divine law, to fasten and fetter them with the testimony of holy Scripture as with chains? Samson caught the foxes and put torches of fire on their tails after they were coupled. What do the tails of the foxes tied together signify? What are foxes' tails except the results of heresy (for their first appearance is flattering and deceitful) bound fast, that is, condemned and dragging fire in their trail? Moreover, they destroy the fruits and good works of those who consent to their seductions. People are told, Do not listen to heretics, do not consent to them or be seduced by them. They reply, Why? Has not that one or so and so listened to heretics? Has not that other Christian committed such vices, such adultery, or such robbery? And what evil has befallen him? Those are the first appearances of the foxes, and souls that are seduced pay attention; the fire is behind them. Nothing has happened to him now, it is said. Since nothing has gone before, will nothing be dragged after? He is sure to come to the fire which follows. Do you think further that the heretics drag along the fire with which to burn the fruits of their enemies but are not themselves burned? Doubtless, when the foxes burned the harvest they, too, were burned. This judgment will come back upon the heretics; what they do not see now they have behind them. They delight people with their flattery and show themselves at first free from restraint. But at the judgment of God their tails are bound, that is, they drag fire upon themselves afterwards, since wickedness preceded their punishment.”