And [if] the priest see that, behold, the scab spreadeth
Is not at a stay, as when he looked at it a second and third time:
then the priest shall pronounce him unclean;
a leprous person; to be absolutely so, as Jarchi expresses it; and so obliged to the birds (to bring birds for his cleansing), and to shaving, and to the offering spoken of in this section, as the same writer observes:
it [is] a leprosy:
it is a clear and plain case that it was one, and no doubt is to be made of it, it is a spreading leprosy: as sin is; it spreads itself over all the powers and faculties of the soul, and over all the members of the body; and it spreads more and more in every stage of life, unless and until grace puts a stop to it.