וְרָאָ֣ה הַכֹּהֵ֗ן וְהִנֵּ֧ה בְעוֹר־בְּשָׂרָ֛ם בֶּהָרֹ֖ת כֵּה֣וֹת לְבָנֹ֑ת בֹּ֥הַק ה֛וּא פָּרַ֥ח בָּע֖וֹר טָה֥וֹר הֽוּא׃ (ס)
then the priest shall look; and, behold, if the bright spots in the skin of their flesh be of a dull white, it is a tetter, it hath broken out in the skin: he is clean.
Mishnah Negaim
Rabbi Shimon said: when is this the case? When the quick flesh was exactly the size of a lentil. But if it was larger than a lentil, the excess is a sign of spreading of the inner one, and the outer one is unclean. If there was white scurf less that the size of a lentil, it is a sign of the spreading of the inner bright spot but it is not a sign of spreading of the outer one.