Derasha 163 on Vayikra 13:22

TT #163 · Parshas Tazria · Aliyah 3 · Passuk 22

The Complete Passuk

וְאִם־פָּשֹׂ֥ה תִפְשֶׂ֖ה בָּע֑וֹר וְטִמֵּ֧א הַכֹּהֵ֛ן אֹת֖וֹ נֶ֥גַע הִֽוא׃

English: If it spreads in the skin, the priest shall pronounce him unclean; it is an affliction.

Torah Temimah cites Sifra (Toras Kohanim) for the recurrence of a sign after it previously disappeared.

Core Text — Sifra

הֶחְלִיטוֹ בְּשֵׂעָר לָבָן, הָלַךְ שֵׂעָר לָבָן וְחָזַר שֵׂעָר לָבָן; וְכֵן בְּפִשְׂיוֹן... לְכָךְ נֶאֱמַר וְאִם פָּשֹׂה תִפְשֶׂה.

English: The repeated phrase covers recurring signs: a white hair or spreading may disappear and then return.

Textual derivation

If a sign such as white hair or spreading disappears and later returns, the renewed sign can restore the relevant ruling.