Charles Ellicott Commentary Leviticus 13:9

"When the plague of leprosy is in a man, then he shall be brought unto the priest;" — Leviticus 13:9 (ASV)

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