لاويين ١٣:٢٩

Leprosy upon the head or chin. - If the priest saw a mole upon the head or chin of a man or woman, the appearance of which was deeper than the skin, and on which the hair was yellow (צהב golden, reddish, fox-colour) and thin, he was to regard it as נתק. Leprosy on the head or chin is called נתק, probably from נתק to pluck or tear, from its plucking out the hair, or causing it to fall off; like κνήφη, the itch, from κνάω, to itch or scratch, and scabies, from scabere. But if he did not observe these two symptoms, if there was no depression of the skin, and the hair was black and not yellow, he was to shut up the person affected for seven days. In בּו אין שׁחר (Lev 13:31) there is certainly an error of the text: either שׁחר must be retained and אין dropped, or שׁהר must be altered into צהב, according to Lev 13:37. The latter is probably the better of the two.

The next ceremonial uncleanness is that of the leprosy, concerning which the law was very large and particular; we have the discovery of it in this chapter, and the cleansing of the leper in the next. Scarcely any one thing in all the levitical law takes up so much room as this. I. Rules are here given by which the priest must judge whether the man had the leprosy or no, according as the symptom was that appeared. 1. If it was a swelling, a scab, or a bright spot (v. 1-17). 2. If it was a bile (Lev 13:18-23). 3. If it was in inflammation (Lev 13:24-28). 4. If it was in the head or beard (Lev 13:29-37). 5. If it was a bright spot (Lev 13:38, Lev 13:39). 6. If it was in a bald head (Lev 13:40-44). II. Direction is given how the leper must be disposed of (Lev 13:45, Lev 13:46). III. Concerning the leprosy in garments (Lev 13:47, etc.).