Leviticus 13:3

“And the priest shall look on the plague in the skin of the flesh, etc.] Whether it be a swelling, scab, or a bright spot that appears, and judge of it by the following rules, and none but a priest might do this: and [when] the hair in the plague is turned white; it arising in a place where hair grows, and which hair is not naturally white, but of another colour, but changed through the force of the plague; and there were to be two hairs at least, which were at first black, but turned white; so Jarchi and Ben Gersom: and these hairs, according to the Misnah f435, must be white at bottom; if the root (or bottom) is black, and the head (or top) white, he is clean; if the root white, and the…”

“the priest shall look on the plague in the skin of the flesh, &c.--The leprosy, as covering the person with a white, scaly scurf, has always been accounted an offensive blemish rather than a serious malady in the East, unless when it assumed its less common and malignant forms. When a Hebrew priest, after a careful inspection, discovered under the cutaneous blemish the distinctive signs of contagious leprosy, the person was immediately pronounced unclean, and is supposed to have been sent out of the camp to a lazaretto provided for that purpose. If the symptoms appeared to be doubtful, he ordered the person to be kept in domestic confinement for seven days, when he was subjected to a second…”

“The hair in the plague is turned white - The sparing growth of very fine whitish hair on leprous spots in the place of the natural hair, appears to have been always regarded as a characteristic symptom. the plague in sight be deeper than the skin of his flesh - Rather The stroke appears to be deeper than the scarf skin. The bright spot changed to a brownish color with a metallic or oily luster, and with a clearly-defined edge. This symptom, along with the whitish hair, at once decided the case to be one of leprosy. return to 'Top of Page'”

“When the hair is turned white - This change of colour was an evidence both of the abundance of excrementious humours, and of the weakness of nature, as we see in old and sick persons. His flesh - For the leprosy consumed both the skin and the flesh. Leviticus 13:4”

“13:3 more than skin-deep: This indicates that either the infection had eaten away the skin or the infection was visible beneath the skin. The white hair, together with the depression in the skin, indicated a skin disease that could spread (13:21-23). This made the person unclean (13:8).”

“shall look: Lev 13:2, Lev 10:10; Eze 44:23; Hag 2:11; Mal 2:7; Act 20:28; Rom 3:19, Rom 3:20, Rom 7:7; Heb 13:7; Rev 2:23 turned: Eze 16:30; Hos 7:9 deeper: Gen 13:3; Ti2 2:16, Ti2 2:17, Ti2 3:13 pronounce: Mat 16:19, Mat 18:17, Mat 18:18; Joh 20:23; Rom 3:19, Rom 3:20; Co1 5:4-6; Th2 3:14, Th2 3:15; Ti1 1:20 Leviticus 13:4”