Mishnayos Horayos Perek 1 Mishnah 4

If the court issued a ruling, and one of the judges knew that they erred and he said to them: You are mistaken; or if the most distinguished [mufla] member of the court was not there for that session of the Sanhedrin, or if one of the judges was disqualified from serving as a judge, e.g., because he was a convert, or a child born from an incestuous or adulterous relationship [mamzer], or a Gibeonite, or an old man no longer able to father children, this court is exempt, because they have not rendered a full-fledged ruling. This is derived by means of a verbal analogy, as “assembly” is stated here with regard to a court that issues an erroneous ruling: “And if the entire assembly of Israel shall act unwittingly” (Leviticus 4:13), and “assembly” is stated there with regard to the halakha of one who commits murder unwittingly: “And the assembly shall judge between the one who struck and the blood redeemer” (Numbers 35:24). Just as in the “assembly” stated there, with regard to the unwitting murderer, all the judges must be fit to issue rulings, so too, in the “assembly” stated here, with regard to the court that issued an erroneous ruling; the court will not be liable unless all the judges will be fit to issue rulings. If the judges of the court issued an erroneous ruling unwittingly and the entire congregation performed a transgression unwittingly on the basis of their ruling, the court brings a bull, as it is stated in the Torah with regard to an unwitting communal sin-offering. If the court issued the erroneous ruling intentionally, as they knew that their ruling was incorrect, and the congregation performed a transgression unwittingly on the basis of the ruling of the court, each member of the congregation brings a female lamb or a female goat as an individual sin-offering. If the court issued the erroneous ruling unwittingly and the congregation performed a transgression intentionally, i.e., with the knowledge that the ruling of the court was erroneous, these people are exempt from bringing an offering.

הוֹרוּ בֵית דִּין, וְיָדַע אֶחָד מֵהֶן שֶׁטָּעוּ, וְאָמַר לָהֶן טוֹעִין אַתֶּם, אוֹ שֶׁלֹּא הָיָה מֻפְלָא שֶׁל בֵּית דִּין שָׁם, אוֹ שֶׁהָיָה אַחַד מֵהֶן גֵּר אוֹ מַמְזֵר אוֹ נָתִין אוֹ זָקֵן שֶׁלֹּא רָאָה לוֹ בָנִים, הֲרֵי אֵלּוּ פְטוּרִין, שֶׁנֶּאֱמַר כָּאן עֵדָה (ויקרא ד) וְנֶאֱמַר לְהַלָּן (במדבר לה) עֵדָה, מָה עֵדָה הָאֲמוּר לְהַלָּן עַד שֶׁיִּהְיוּ כֻלָּם רְאוּיִין לְהוֹרָאָה, אַף עֵדָה הָאֲמוּרָה כָאן עַד שֶׁיִּהְיוּ כֻלָּם רְאוּיִים לְהוֹרָאָה. הוֹרוּ בֵית דִּין שׁוֹגְגִים וְעָשׂוּ כָל הַקָּהָל שׁוֹגְגִין, מְבִיאִין פָּר. מְזִידִין וְעָשׂוּ שׁוֹגְגִין, מְבִיאִין כִּשְׂבָּה וּשְׂעִירָה. שׁוֹגְגִין וְעָשׂוּ מְזִידִין, הֲרֵי אֵלּוּ פְטוּרִין: