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Rosh Hashanah 2.1-2
Rosh Hashanah2: 1
אִם אֵינָן מַכִּירִין אוֹתוֹ, מְשַׁלְּחִין אַחֵר עִמּוֹ לְהַעִידוֹ.
בָּרִאשׁוֹנָה הָיוּ מְקַבְּלִין עֵדוּת הַחֹדֶשׁ מִכָּל אָדָם; מִשֶּׁקִּלְקְלוּ הַמִּינִין, הִתְקִינוּ שֶׁלֹּא יְהוּ מְקַבְּלִין אֶלָּא מִן הַמַּכִּירִים.
If they do not know him, they send another [pair of witnesses] with him to testify about him. Originally they accepted testimony about the new moon from anyone, [but] after the heretics did harm, they enacted that they should not accept [testimony] except from known people.
Rosh Hashanah2: 2
בָּרִאשׁוֹנָה הָיוּ מַשִּׂיאִין מַשּׂוּאוֹת; מִשֶּׁקִּלְקְלוּ הַכּוּתִים, הִתְקִינוּ שֶׁיְּהוּ שְׁלוּחִין יוֹצְאִין.
Originally they used to light torches; [but] after the Cutheans did harm, they enacted that messengers should go forth.
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