1 Samuel 6:4

According to the number of the provinces of the Philistines, etc. According to the number of the five senses of the body, which you contaminated by looking back, whose fruits you all lost by poorly handling faith, now in all that you do by seeing, hearing, tasting, smelling, or touching, offer to Christ the most illustrious virtues due to him, such as patience, compunction, humility, and others.

We read in the first book of Kings [Samuel] that because of the damage done to the consecrated ark the foreigners were smitten on their hinder parts, so that they even suffered the dreadful fate of being gnawed alive by mice. This remains a perennial reproach on them, because no other was punished in this way. Similarly he afflicts sinners in the afterlife … they are so devoured by mice when the devil's hostile troop surrounds them.

5. What does it mean that five likenesses of tumors, and as many likenesses of mice, according to the number of the provinces, are commanded to be made, and thus the debt to the ark is paid? These things indeed, if weighed in the Jewish manner according to the lowliness of the letter, are not only to be despised, but not even worthy of hearing. He indeed receives these things worthily who understands that the more lowly they sound by the letter, the more useful they are through their spiritual meaning. For the Holy Spirit, by whose inspiration this entire sacred history is written, would never have brought forth such lowly things if He did not signify certain great and very precious mysteries in the hidden depth of this lowliness. Whence the excellent teacher declares, saying: "All these things happened to them in figure; but they were written for our sake, upon whom the ends of the ages have come" (1 Cor. 10:11). Therefore, the more base what they say appears in the exposed flesh, as it were, of the letter, the more deeply must they be sought through the spirit. What then are the likenesses of tumors, what are the images of mice? And since we referred these things above both to tempting demons and to the members of sinners exposed to stenches, in what sense are the likenesses of tumors and mice gilded? But indeed the debt to the ark for sin is well paid if the likenesses of tumors and mice are fashioned from gold. For in the likeness of a tumor, the member that emits stench is seen; and yet, because it is a likeness, not the reality, it is no longer stained by any stench. And because it is made of gold, this indeed suggests that by the splendor of beauty the appearance of deformity is transformed. Therefore the converted sinner makes a likeness of a tumor when he brings to memory with what stenches of sin he had surrendered his members. Therefore to fashion a likeness of a tumor is to recall with a penitent heart the shame of one's members that recently sinned. And so he fashions not a tumor, but the likeness of a tumor, who both washes his members from the stenches of sin and does not fail to recall to which sins he had subjected those same members. And indeed the likeness of a tumor is seen to be made of gold, because the shamefulness of sins is worn away unto the prize of eternal salvation. Or perhaps by remembering, the likenesses of tumors are made;…