וְאִם־תַּחְתֶּ֜יהָ תַּעֲמֹ֤ד הַבַּהֶ֙רֶת֙ לֹ֣א פָשָׂ֔תָה צָרֶ֥בֶת הַשְּׁחִ֖ין הִ֑וא וְטִהֲר֖וֹ הַכֹּהֵֽן׃ (ס)
But if the bright spot stay in its place, and be not spread, it is the scar of the boil; and the priest shall pronounce him clean.
Read kabbalistic (mystical) interpretation of Leviticus 13:23: and classical mystical sources.