Mishnayos Bava Kamma Perek 3 Mishnah 10

There are cases where one is liable for an act of damage caused by his ox, but exempt from liability for the same action if he performed it himself. Conversely, there are also cases where one is exempt from liability for the action of his ox, but liable for his own action. How so? If his ox caused a person humilation, he is exempt from paying compensation, but if he himself humiliated another, he is liable. Similarly, if his ox blinded the eye of his slave or knocked out his slave’s tooth, he is exempt from having to emancipate the slave for this mutilation. But if he himself blinded his slave’s eye or knocked out his tooth, he is liable to emancipate him, as stated in the Torah (Exodus 21:26–27). By contrast, if his ox injured the owner’s father or his mother, he is liable to pay damages, but if he himself injured his father or his mother, he is exempt from paying compensation. Similarly, if his ox set fire to a haystack on Shabbat, he is liable to pay damages. But if he himself set fire to a haystack on Shabbat, he is exempt from paying damages. He is exempt from payment in these cases due to the fact that he is liable to receive the death penalty for injuring his father or mother or for desecrating Shabbat.

יֵשׁ חַיָּב עַל מַעֲשֵׂה שׁוֹרוֹ וּפָטוּר עַל מַעֲשֵׂה עַצְמוֹ, פָּטוּר עַל מַעֲשֵׂה שׁוֹרוֹ וְחַיָּב עַל מַעֲשֵׂה עַצְמוֹ. שׁוֹרוֹ שֶׁבִּיֵּשׁ, פָּטוּר, וְהוּא שֶׁבִּיֵּשׁ, חַיָּב. שׁוֹרוֹ שֶׁסִּמֵּא אֶת עֵין עַבְדּוֹ, וְהִפִּיל אֶת שִׁנּוֹ, פָּטוּר, וְהוּא שֶׁסִּמֵּא אֶת עֵין עַבְדּוֹ, וְהִפִּיל אֶת שִׁנּוֹ, חַיָּב. שׁוֹרוֹ שֶׁחָבַל בְּאָבִיו וְאִמּוֹ, חַיָּב, וְהוּא שֶׁחָבַל בְּאָבִיו וְאִמּוֹ, פָּטוּר. שׁוֹרוֹ שֶׁהִדְלִיק אֶת הַגָּדִישׁ בְּשַׁבָּת, חַיָּב, וְהוּא שֶׁהִדְלִיק אֶת הַגָּדִישׁ בְּשַׁבָּת, פָּטוּר, מִפְּנֵי שֶׁהוּא מִתְחַיֵּב בְּנַפְשׁוֹ: