Leviticus 13:17 ASV

¹⁵  And the priest shall look on the raw flesh, and pronounce him unclean: the raw flesh is unclean: it is leprosy.

¹⁶  Or if the raw flesh turn again, and be changed unto white, then he shall come unto the priest;

¹⁷  and the priest shall look on him; and, behold, if the plague be turned into white, then the priest shall pronounce 'him' clean 'that hath' the plague: he is clean.

¹⁸  And when the flesh hath in the skin thereof a boil, and it is healed,

¹⁹  and in the place of the boil there is a white rising, or a bright spot, reddish-white, then is shall be showed to the priest;