Leviticus 13:21-23

Amplified Bible

²¹ But if the priest examines it and finds no white hair in it and it is not deeper than the skin and is dull in color, then the priest shall isolate him for seven days. ²² If it spreads farther on the skin, then the priest shall pronounce him unclean; it is a disease. ²³ But if the bright spot remains where it is and does not spread, it is the scar of the boil, and the priest shall pronounce him clean.