Um Baheret como [o tamanho de] um feijão [que é o tamanho mínimo de um Nega válido ] e uma corda [de Nega expandido ] se estendem para fora dele, se tiver a largura de dois cabelos, é obrigatório [nas leis impureza] em relação aos cabelos brancos [nele] e [mais] expansão, mas não [a respeito] de um pedaço de pele saudável. Dois Baherot e uma faixa estreita se estendem de um para o outro, se tiver a largura de dois cabelos, ele os combina [para formar um Nega ]. E se não, ele não os combina.
Bartenura on Mishnah Negaim
זוקקה לשער לבן ולפסיון (if [the streak/thread] subjects it [the bright spot] to [restrictions in respect to] white hair and spreading) – if there is in that thread a white hair, he is declared to be a definitive leper. Or if it spread near the thread at the end of a week, he is impure. But if there isn’t in the width of the thread two hairs but it has white hair he does not defile, for it is not considered from the plague. But if it spread near the thread and there isn’t in its width two hairs, it is considered like spreading far from the plague, and it requires like a split [Cilician] bean.
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English Explanation of Mishnah Negaim
If a bright spot was of the size of a split bean and a string extended from it, if it was two hairs in breadth, it is subject to the restrictions in respect of white hair and spreading, but not to that in respect of its quick flesh. The mishnah discusses a nega (a bright spot or baheret in Hebrew) from which a line of some sort extends. If this line is thick enough, then the line is considered part of the nega in that if a white hair comes out of the line or if the line spreads, it is a sign of impurity. However, if quick flesh appears in the line it is not a sign of impurity unless the quick flesh itself is the size of a split bean.
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Bartenura on Mishnah Negaim
אבל לא למחיה – that even if here is in the width of the thread of two hairs, the quick flesh that is on it does not defile. For the quick flesh needs that will be encompassed in the middle of the plague like a fortress which is in the middle of the city.
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English Explanation of Mishnah Negaim
If there were two bright spots and a streak extended from one to the other, if it was two hairs in breadth, it combines them; but if not, it does not combine them. A line (a streak) between two negaim serves to join them if it is wide enough. In such a case they are treated as one nega, and if a white hair or spreading appears in one, both are judged to be impure.
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Bartenura on Mishnah Negaim
מצרפן – and they are judged as one plague. But if one of them spread a little bit or a white hair was forthcoming on one of them, he is declared to be a definitive leper on both of them.
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Bartenura on Mishnah Negaim
ואם לאו אימנן מצרפן – and they are judged as two plagues, but if one of them spread but the other one did not spread, he is declared to be a definitive leper on the one, and is shut up/isolated on the other. And the practical difference is that when he is declared to be pure, he is required to bring two sacrifices.