Leviticus 13:35-37 New English Translation (NET)

35. If, however, the scall spreads further on the skin after his purification,

36. then the priest is to examine it, and if the scall has spread on the skin the priest is not to search further for reddish yellow hair. The person is unclean.

37. If, as far as the priest can see, the scall has stayed the same and black hair has sprouted in it, the scall has been healed; the person is clean. So the priest is to pronounce him clean.

Leviticus 13