TT #247 · Parshas Tazria · Aliyah 7 · Passuk 45
English: As for the person afflicted with tzaraas, his garments shall be torn, his head shall be unkempt, he shall cover his upper lip, and he shall call out, “Impure! Impure!”
Torah Temimah cites Bava Kama 92a for this teaching on the metzora’s public conduct and ritual status.
English: Whoever asks for mercy for another person, when he himself needs the same thing, is answered first.
Textual derivation
The prayers prompted by the metzora’s public announcement can benefit both the person praying and the person for whom he prays.