Jerusalem Talmud Bava Kamma 8.5

משנה: חֵרֵשׁ שׁוֹטֶה וְקָטָן פְּגִיעָתָן רָעָה הַחוֹבֵל בָּהֶן חַיָיב וְהֵם שֶׁחָבְלוּ בַּאֲחֵרִים פְּטוּרִין. הָעֶבֶד וְהָאִשָּׁה פְּגִיעָתָן רָעָה הַחוֹבֵל בָּהֶן חַיָיב וְהֵם שֶׁחָבְלוּ בַּאֲחֵרִים פְּטוּרִין אֲבָל מְשַׁלְּמִין לְאַחַר זְמַן. נִתְגָּרְשָׁה הָאִשָּׁה וְנִשְׁתַּחְרֵר הָעֶבֶד חַיָיבִין לְשַׁלֵּם. הַמַּכֶּה אָבִיו וְאִמּוֹ וְעָשָׂה בָהֶם חַבּוּרָה וְהַחוֹבֵל בַּחֲבֵירוֹ בַּשַׁבָּת פָּטוּר מִכּוּלָּן מִפְּנֵי שֶׁהוּא נִידּוֹן בְּנַפְשׁוֹ. וְהַחוֹבֵל בְּעֶבֶד כְּנַעֲנִי שֶׁלּוֹ פָּטוּר מִכּוּלָּן.

MISHNAH: It is bad to meet a deaf-mute, an insane, or an underage person: Anybody who injures them is liable but they who cause injury are not liable. It is bad to meet a woman or a slave: Anybody who injures them is liable but they who cause injury are not liable, but they might have to pay later. If the woman was divorced or the slave manumitted, they have to pay. A person who hits his father or mother causing a concussion or who causes injury to a fellow man on the Sabbath is not liable for anything since he is tried for his life. One who injures his own Canaanite slave is not liable for anything.

הלכה: חֵרֵשׁ שׁוֹטֶה וְקָטָן פְּגִיעָתָן רָעָה כול׳. תַּנֵּי. וְהָעֵדִים שֶׁאָמְרוּ מֵעִידִים אָנוּ עַל פְּלוֹנִי שֶׁסִּימָּא עֵין עַבְדּוֹ וְהִפִּיל שִׁינּוֹ שֶׁכֵּן הָרַב אוֹמֵר. וְנִמְצְאוּ זוֹמְמִין. מְשַׁלְּמִין לָעֶבֶד. וְכוּלֵּיהּ מִן אָהֵן עוֹבְדָא מֵימַר כֵּן. אָמַר רִבִּי נַסָּה. וִינּוּן דַּמְרוֹן כֵּן. מֵעִידִין אָנוּ עַל פְּלוֹנִי שֶׁנִּכְנַס תַּחַת יָדוֹ שָׁלֵם וְיָצָא חָבוּל בִּשְׁתַּיִם. יוֹצֵא לַחֵירוּת בָּרִאשׁוֹנָה וְנוֹתֵן לוֹ דְמֵי שְׁנִיָיה.

HALAKHAH: “It is bad to meet a deaf-mute, an insane, or an underage person,” etc. It was stated: If the witnesses said, we testify that X blinded the eye of his slave and broke his tooth, for that is what the master said, and they are found to be perjured, they pay to the slave. How can they say this about the case? Rebbi Nasa said, those might say the following: We testify about X that [the slave] came to his hand unimpaired and left with two injuries. Then he gains his freedom with the first and he has to pay him for the second.