Jerusalem Talmud Sanhedrin 3.10

משנה: גָּמְרוּ אֶת הַדָּבָר הָיוּ מַכְנִיסִין אוֹתָן. הַגָּדוֹל שֶׁבַּדַּיָינִין אוֹמֵר אִישׁ פְּלוֹנִי אַתָּה זַכַּאי אִישׁ פְּלוֹנִי אַתָּה חַיָיב. וּמְנַיִין כְּשֶׁיֵּצֵא לֹא יֹאמַר אֲנִי הוּא הַמְזַכֶּה וַחֲבֵרַי מְחַיְיבִין וּמָה אֶעֱשֶׂה וְרַבּוּ עָלַי. עַל זֶה נֶאֱמַר הוֹלֵךְ רָכִיל מְגַלֶּה סּוֹד:

MISHNAH: When they have come to a decision, they bring the parties in. The chief judge says, Mr. X, you are not guilty, Mr. X, you are guilty. From where that afterwards, one may not say, I had found for you but my colleagues found you guilty, but what can I do since they were a majority against me? On such a one it was said: The gossip uncovers secrets.

הלכה: גָּמְרוּ אֶת הַדָּבָר כול׳. אָמַר רִבִּי יוֹחָנָן. כּוֹפִין אֶת הַמְחַיֵיב שֶׁיִּכְתּוֹב זַכַּאי. רִבִּי שִׁמְעוֹן בֶּן לָקִישׁ אָמַר. הַמְחַיֵיב כּוֹתֵב חַיָיב וְהַמְזַכֶּה כוֹתֵב זַכַּאי. מַתְנִיתָא פְלִיגָא עַל רֵישׁ לָקִישׁ. מְנַיִין כְּשֶׁיֵּצֵא לֹא יֹאמַר. אֲנִי מְזַכֶּה וַחֲבֵירַיי מְחַיְיבִין. מָה עֲבַד לָהּ רִבִּי יוֹחָנָן. דְּלָא יְהֵא מָאן דְּהוּא מֵימַר. כַּמָּה בָעִית לִפְלוֹנִי מְזַכֶּה לִפְלוֹנִי בְדִינָא וְלָא שַׁבְקוֹן לִי. מַאי טַעֲמָא דְרֵישׁ לָקִישׁ. דְּלָא יֵיתֵי חוֹרָן וְיִסְבּוֹר דִּכְוָותֵיהּ וְיֵימַר. אוֹף פַּלָּן הֲוָה תַמָּן אוֹף הוּא טָעָה.

HALAKHAH: “When they have come to a decision,” etc. Rebbi Joḥanan said, one forces the one who finds guilty to write “not guilty.” Rebbi Simeon ben Laqish says, the one who finds guilty, writes “guilty”; the one who finds not guilty, writes “not guilty”. The Mishnah disagrees with Rebbi Simeon ben Laqish: “From where that afterwards, one may not say, I had found for you but my colleagues found you guilty.” What does Rebbi Joḥanan do with this? That nobody could say, I really wanted to justify X in his suit but they did not let me do it. What is Rebbi Simeon ben Laqish’s reason? That no other person should come, reason as he did, and say, also that one was there and he erred.