Leviticus 13:3-5

The Voice

³ The priest must examine the spot on the skin. If the hair on it has turned white, and the affected area appears to go deep beneath the skin, then it is a serious skin disease. After the examination, he will then pronounce the diseased person unclean. ⁴ But if the patch on the skin is white and does not appear to go deep beneath the skin, and the hair on it has not turned white, then the priest will quarantine the person for seven days. ⁵ When the seventh day arrives, the priest will examine the affected area again; and if the priest thinks it has not grown worse and has not spread to other parts of the skin, then the priest will continue the quarantine for another seven days.