Leviticus 13:7
But if the scab spread much abroad in the skin, after that he hath been seen of the priest for his cleansing, he shall be seen of the priest again: But if the scab spread much abroad in the skin, after that he hath been seen of the priest for his cleansing, he shall be seen of the priest again:
Leviticus 13:7 belongs to the laws in Leviticus 12 to 15, also described as chapters 12 to 14, regulating uncleanness, leprosy, cleansing, and sanitation, including contagious diseases and diseases that leave infectious germs in buildings, with full directions concerning the plague of leprosy as an acknowledged incurable disease. It requires the person to be seen by the priest again if the scab spreads much abroad in the skin after he has already been seen by the priest for his cleansing, with a growing white eruption and whitening eyebrows illustrating the kind of worsening skin condition at issue. Leprosy in this law is a horrible disease and a fitting type, picture, and prefigure of sin, including mortal sin, embracing every kind of evil thing as a terrible moral disease. Like leprosy, sin is widespread, infectious, destructive, and incurable by human means and never gets well of itself, with its chief seat within and its effects reaching outward. Like leprosy is contagious, the sinner contaminates the very atmosphere and introduces pollution where all before was comparative purity, and his society leads others to sin, so his influence is more to be feared than the infection of the leper.
As part of the laws of sanitation promulgated by Moses, the verse stands at the head of sanitary law, and the enduring superiority of those laws is conclusive evidence of the divine inspiration that guided Moses. Under the law of cleansing, a person's visible uncleanness had to be removed before the sanctuary's cleansing by blood, so the law required the leper to experience complete cleansing from the dread malady. Such cleansing from leprosy was no less a miracle than raising the dead, came by faith in the cleansing power of the Author of these ceremonies so that these rites show faith in Christ, and leprosy is a condition Jesus had power to heal. The verse is connected with the need for sin to be removed through a humbling that puts the old self to death and makes room for the new.