(9) When the plague of leprosy is in a man.--The second case, discussed inverses 9-17, is of leprosy re-appearing after it has been cured, when a somewhat different treatment is enjoined. In its re-appearance, as in its first manifestation, the patient is forthwith to be brought to the priest.

Verses 9-11. - The method of procedure in the case of a doubtful leprosy having been laid down in the previous verses, the rule for dealing with an unmistakable case is here given. When the characteristic white spot and white hair are present (if the rising be white in the skin, and it have turned the hair white), and if a third symptom be present - if there be quick raw flesh in the rising, that is, if there be an ulcer underneath the white scab, there is to be no delay, as in the previous case, but judgment is to be passed at once. The priest shall pronounce him unclean, and shall not shut him up: for he is manifestly unclean.

13:1-17 The plague of leprosy was an uncleanness, rather than a disease. Christ is said to cleanse lepers, not to cure them. Common as the leprosy was among the Hebrews, during and after their residence in Egypt, we have no reason to believe that it was known among them before. Their distressed state and employment in that land must have rendered them liable to disease. But it was a plague often inflicted immediately by the hand of God. Miriam's leprosy, and Gehazi's, and king Uzziah's, were punishments of particular sins; no marvel there was care taken to distinguish it from a common distemper. The judgment of it was referred to the priests. And it was a figure of the moral pollutions of men's minds by sin, which is the leprosy of the soul, defiling to the conscience, and from which Christ alone can cleanse. The priest could only convict the leper, (by the law is the knowledge of sin,) but Christ can cure the sinner, he can take away sin. It is a work of great importance, but of great difficulty, to judge of our spiritual state. We all have cause to suspect ourselves, being conscious of sores and spots; but whether clean or unclean is the question. As there were certain marks by which to know it was leprosy, so there are marks of such as are in the gall of bitterness. The priest must take time in making his judgment. This teaches all, both ministers and people, not to be hasty in censures, nor to judge anything before the time. If some men's sins go before unto judgment, the sins of others follow after, and so do men's good works. If the person suspected were found to be clean, yet he must wash his clothes, because there had been ground for the suspicion. We have need to be washed in the blood of Christ from our spots, though not leprosy spots; for who can say, I am pure from sin?When the plague of leprosy is in a man,.... He has all the signs of it, and it is pretty manifest both to himself and others that it is upon him:

then he shall be brought unto the priest; by his friends and neighbours, if he is not willing to come of himself: a sinner insensible of the leprosy of sin, and of his unclean and miserable state through it, has no will to come to Christ the great High Priest for cleansing; but one that is sensible of it, and of Christ's ability to help and cleanse him, will come freely and gladly, and importunately seek to him for it; though indeed such an one is brought by powerful and efficacious grace to him, yet not against, but with his full will; see John 5:40; compare with this Matthew 8:1.