Leviticus 13:10

Living flesh. The leprosy is caused by immense numbers of worms, which crawl between the skin and the flesh, and sometimes infect the latter, and they very bones, garments, &c. Hence the flesh seems all in motion, and living. (Haydock) --- The different spots in the skin represent heretical opinions obscuring the true faith, of which priests are the judges. (Deuteronomy xvii.; St. Augustine, q. Evang. ii. 40.) (Worthington)