29 'And when a man (or a woman) hath in him a plague in the head or in the beard, 30 then hath the priest seen the plague, and lo, its appearance is deeper than the skin, and in it a thin shining hair, and the priest hath pronounced him unclean; it 'is' a scall—it 'is' a leprosy of the head or of the beard. 31 'And when the priest seeth the plague of the scall, and lo, its appearance is not deeper than the skin, and there is no black hair in it, then hath the priest shut up 'him who hath' the plague of the scall seven days. 32 'And the priest hath seen the plague on the seventh day, and lo, the scall hath not spread, and a shining hair hath not been in it, and the appearance of the scall is not deeper than the skin, 33 then he hath shaved himself, but the scall he doth not shave; and the priest hath shut up 'him who hath' the scall a second seven days. 34 And the priest hath seen the scall on the seventh day, and lo, the scall hath not spread in the skin, and its appearance is not deeper than the skin, and the priest hath pronounced him clean, and he hath washed his garments, and hath been clean. 35 'And if the scall spread greatly in the skin after his cleansing, 36 and the priest hath seen him, and lo, the scall hath spread in the skin, the priest seeketh not for the shining hair, he is unclean; 37 and if in his eyes the scall hath stayed, and black hair hath sprung up in it, the scall hath been healed—he 'is' clean—and the priest hath pronounced him clean.

Matthew Henry's Commentary on Leviticus 13:29-37

Commentary on Leviticus 13:18-44

(Read Leviticus 13:18-44)

The priest is told what judgment to make, if there were any appearance of a leprosy in old sores; and such is the danger of those who having escaped the pollutions of the world are again entangled therein. Or, in a burn by accident, verse 24. The burning of strife and contention often occasions the rising and breaking out of that corruption, which proves that men are unclean. Human life lies exposed to many grievances. With what troops of diseases are we beset on every side; and thy all entered by sin! If the constitution be healthy, and the body lively and easy, we are bound to glorify God with our bodies. Particular note was taken of the leprosy, if in the head. If the leprosy of sin has seized the head; if the judgment be corrupted, and wicked principles, which support wicked practices, are embraced, it is utter uncleanness, from which few are cleansed. Soundness in the faith keeps leprosy from the head.