Says the Gemara in Shabbos [15a]:
וְאִידַּךְ, הִלֵּל אוֹמֵר: מְלֹא הִין מַיִם שְׁאוּבִים פּוֹסְלִים אֶת הַמִּקְוֶה — שֶׁחַיָּיב אָדָם לוֹמַר בִּלְשׁוֹן רַבּוֹ. שַׁמַּאי אוֹמֵר: תִּשְׁעָה קַבִּין. וַחֲכָמִים אוֹמְרִים: לֹא כְּדִבְרֵי זֶה וְלֹא כְּדִבְרֵי זֶה. עַד שֶׁבָּאוּ שְׁנֵי גַרְדִּיִּים מִשַּׁעַר הָאַשְׁפָּה שֶׁבִּירוּשָׁלַיִם וְהֵעִידוּ מִשּׁוּם שְׁמַעְיָה וְאַבְטַלְיוֹן שֶׁשְּׁלֹשָׁה לוּגִּין מַיִם שְׁאוּבִין פּוֹסְלִים אֶת הַמִּקְוֶה, וְקִיְּימוּ חֲכָמִים אֶת דִּבְרֵיהֶם.
And another dispute between Hillel and Shammai is that Hillel says: A full hin, twelve log, of drawn water poured into a ritual bath in which there was not yet a full measure of forty se’a disqualifies the water of the ritual bath and accords even the water that had been there previously the status of drawn water. Even if water fit for a ritual bath is subsequently added to complete the measure of forty se’a, the ritual bath remains unfit for immersion. Hillel used the biblical measure, hin, because, when quoting one’s teacher, a person must speak employing the language of his teacher. Shammai says: Nine kav of water is enough to disqualify the ritual bath. And the Rabbis say: The halakha is neither in accordance with the statement of this one nor in accordance with the statement of that one. The Sages did not determine a measure for the water disqualifying a ritual bath until two weavers came from the Dung Gate in Jerusalem and testified in the name of Shemaya and Avtalyon that three log of drawn water disqualify the ritual bath, and the Rabbis upheld their statement against the opinions of the great Sages of Israel, Hillel and Shammai. The Gemara emphasized their occupation and the place that they lived to underscore that, despite the fact that their occupation was despised and their place was contemptible, there is no preferential treatment when it comes to Torah.
A] Why doesn't it say their names - כל האומר דבר בשם אומרו מביא גאולה לעולם??!!
B] The Tanna D'bei Eliyahu Zuta 16 says that weavers are פסול לעדות - so how can we believe them?? [See Rambam Eidus 11-5]
C] Rashi says:
Why does Rashi say a lashon that one shouldn't refrain from going to the Beis Medrash - "אל ימנע עצמו מבית המדרש" and not that he should LEARN. Like, going to the Beis Medrash implies that they are just going to hang out there.
[שמעתי מכ"ק האדמו"ר מטאלנא שליט"א]