Rashi explains that the reason for the declaration, Tamei!, Tamei!, is that it is a benefit for others, warning them not to come in contact with the spiritually defiled metzora. In the Talmud Shabbos 67a, Chazal explain that when he notifies the “world” that he is tamei, people will hopefully take pity and pray for him. While it is clearly commendable, how do Chazal derive from the words, Tamei, Tamei, Yikra that the metzora should encourage others to pray for him? It makes more sense that these words are a warning, so that people will not err and come in contact…
