Leviticus 13:35-37

New King James Version

³⁵ But if the scale should at all spread over the skin after his cleansing, ³⁶ then the priest shall examine him; and indeed if the scale has spread over the skin, the priest need not seek for yellow hair. He is unclean. ³⁷ But if the scale appears to be at a standstill, and there is black hair grown up in it, the scale has healed. He is clean, and the priest shall pronounce him clean.