Mishnayos Sanhedrin Perek 6 Mishnah 1

When the trial has ended in a guilty verdict and the condemned man has been sentenced to be stoned, he is taken out to be stoned. The place of stoning was outside the court and a little beyond it, as it is stated with regard to a blasphemer: “Take out him who has cursed to outside the camp, and let all that heard him lay their hands upon his head, and let all the congregation stone him” (Leviticus 24:14). One man stands at the entrance to the court, with cloths [vehasudarin] in his hand, and another man sits on a horse at a distance from him but where he can still see him. If one of the judges says: I can teach a reason to acquit him, the other, i.e., the man with the cloths, waves the cloths as a signal to the man on the horse, and the horse races off after the court agents who are leading the condemned man to his execution, and he stops them, and they wait until the court determines whether or not the argument has substance. And even if he, the condemned man himself, says: I can teach a reason to acquit myself, he is returned to the courthouse, even four or five times, provided that there is substance to his words. If, after the condemned man is returned to the courthouse, the judges find a reason to acquit him, they acquit him and release him immediately. But if they do not find a reason to acquit him, he goes out to be stoned. And a crier goes out before him and publicly proclaims: So-and-so, son of so-and-so, is going out to be stoned because he committed such and such a transgression. And so-and-so and so-and-so are his witnesses. Anyone who knows of a reason to acquit him should come forward and teach it on his behalf.

נִגְמַר הַדִּין, מוֹצִיאִין אוֹתוֹ לְסָקְלוֹ. בֵּית הַסְּקִילָה הָיָה חוּץ לְבֵית דִּין, שֶׁנֶּאֱמַר (ויקרא כד) הוֹצֵא אֶת הַמְקַלֵּל. אֶחָד עוֹמֵד עַל פֶּתַח בֵּית דִּין וְהַסּוּדָרִין בְּיָדוֹ, וְאָדָם אֶחָד רוֹכֵב הַסּוּס רָחוֹק מִמֶּנּוּ כְּדֵי שֶׁיְּהֵא רוֹאֵהוּ. אוֹמֵר אֶחָד יֶשׁ לִי לְלַמֵּד עָלָיו זְכוּת, הַלָּה מֵנִיף בַּסּוּדָרִין וְהַסּוּס רָץ וּמַעֲמִידוֹ. וַאֲפִלּוּ הוּא אוֹמֵר יֶשׁ לִי לְלַמֵּד עַל עַצְמִי זְכוּת, מַחֲזִירִין אוֹתוֹ אֲפִלּוּ אַרְבָּעָה וַחֲמִשָּׁה פְעָמִים, וּבִלְבַד שֶׁיֵּשׁ מַמָּשׁ בִּדְבָרָיו. מָצְאוּ לוֹ זְכוּת, פְּטָרוּהוּ, וְאִם לָאו, יוֹצֵא לִסָּקֵל. וְכָרוֹז יוֹצֵא לְפָנָיו, אִישׁ פְּלוֹנִי בֶּן פְּלוֹנִי יוֹצֵא לִסָּקֵל עַל שֶׁעָבַר עֲבֵרָה פְלוֹנִית, וּפְלוֹנִי וּפְלוֹנִי עֵדָיו, כָּל מִי שֶׁיּוֹדֵעַ לוֹ זְכוּת יָבֹא וִילַמֵּד עָלָיו: