Boil-nega and burn-nega do not combine together; nor do they spread from one to the other; nor do they spread onto skin; nor does [a nega of] the skin spread onto them. If the negaim are on raw flesh [lit., if they are rebellious], they are tahor. [If] they formed a membrane [the thickness of a] garlic peel, this is the ‘‘partially-healed boil’’ mentioned in the Torah. [If] they healed [lit., they reverted] and became normal, even though a scar remains, they are judged as regular skin.

R’ Eliezer was asked: ‘‘[What is the law if] a baheres the size of a sela grows on the inside of someone’s hand, and it is on a partially-healed boil?’’ He said to them: ‘‘[The Kohen] should confine [him].’’ They said to him: ‘‘Why? [The baheres] cannot grow [white] hair, nor can it expand, not does it become tamei if it contains a michyah.’’ He said to them: ‘‘Maybe [the baheres] will contract and [subsequently] expand.’’ They said to him: ‘‘But [what if the partially healed boil] is the size of a gris?’’ He said to them: ‘‘I was not taught.’’ R’ Yehudah ben Beseira said to [R’ Eliezer]: ‘‘I can expound on this [subject].’’ He [R’ Eliezer] said to him [R’ Yehudah ben Beseira]: ‘‘If it is to uphold the words of the Sages, you may.’’ He said to him: ‘‘Perhaps another boil will develop next to it into which [the nega] will spread.’’ He said to him: ‘‘You are a great sage, for you have upheld the words of the Sages.’’