Comentário sobre Baba Batra 5:10
הַסִּיטוֹן מְקַנֵּחַ מִדּוֹתָיו אַחַת לִשְׁלֹשִׁים יוֹם, וּבַעַל הַבַּיִת אַחַת לִשְׁנֵים עָשָׂר חֹדֶשׁ. רַבָּן שִׁמְעוֹן בֶּן גַּמְלִיאֵל אוֹמֵר, חִלּוּף הַדְּבָרִים. חֶנְוָנִי מְקַנֵּחַ מִדּוֹתָיו פַּעֲמַיִם בַּשַּׁבָּת, וּמְמַחֶה מִשְׁקְלוֹתָיו פַּעַם אַחַת בַּשַּׁבָּת, וּמְקַנֵּחַ מֹאזְנַיִם עַל כָּל מִשְׁקָל וּמִשְׁקָל:
O atacadista limpa suas medidas uma vez a cada trinta dias [por causa do vinho e do óleo que nelas congelam e, portanto, reduzem a medida.], E um proprietário [que não vende na escala de um atacadista], uma vez em doze meses. R. Shimon b. Gamliel diz: Exatamente o oposto. Um lojista limpa suas medidas duas vezes por semana [Para um lojista não é necessário "pingar" três gotas, como um atacadista e um proprietário de casa (veja 3: 8) e (resíduo) permanece no vaso e gruda nele.], e ele limpa seus pesos [ou seja, ele limpa as pedras de sua balança com as quais mede as coisas molhadas] uma vez por semana. E ele limpa suas balanças para cada pesagem.
Bartenura on Mishnah Bava Batra
English Explanation of Mishnah Bava Batra
The shopkeeper must clean out his measures twice in the week and polish his weights once a week and clean out his scales after every weighing.
Mishnah ten deals with the proper maintenance of weights and measures to ensure that the purchaser does not receive less than he bought.
The Torah (Leviticus 19:35-36) forbids falsifying weights and commands a person to keep properly weighed and maintained weights and measures. Our mishnah is concerned with the proper maintenance of weights and measures. According to the anonymous opinion in section one, a wholesaler who uses his measures frequently must clean them out once every thirty days. This is to prevent the buildup on the sides of the containers which will reduce the amount purchased. A householder, who uses his measure less frequently, need clean them out only once a year. Rabban Shimon ben Gamaliel holds that the opposite is true. According to him the more frequently one uses the measures, the less buildup will accumulate. Therefore, a householder must clean them out once every thirty days and a wholesaler only once a year. A shopkeeper, who uses his weights frequently, must clean them out twice a week. In addition he must once a week polish his weights so that they don’t grow heavier and clean out his scales after every use so that they don’t accumulate buildup.