12מֵת תַּחַת יָדוֹ פָּטוּר. וְאִם הוֹסִיף רְצוּעָה אַחַת עַל הָאֹמֶד וּמֵת הֲרֵי הַחַזָּן גּוֹלֶה. וְאִם לֹא מֵת הֲרֵי הַחַזָּן עָבַר עַל מִצְוַת לֹא תַּעֲשֶׂה שֶׁנֶּאֱמַר (דברים כה ג) "לֹא יֹסִיף". וְהוּא הַדִּין לְכָל מַכֶּה אֶת חֲבֵרוֹ שֶׁהוּא בְּלֹא תַּעֲשֶׂה. וּמָה אִם זֶה שֶׁנָּתְנָה תּוֹרָה רְשׁוּת לְהַכּוֹתוֹ צִוָּה הַכָּתוּב שֶׁלֹּא לְהַכּוֹתוֹ יָתֵר עַל רִשְׁעוֹ קַל וָחֹמֶר לִשְׁאָר כָּל הָאָדָם. לְפִיכָךְ כָּל הַמַּכֶּה אֶת חֲבֵרוֹ אֲפִלּוּ הִכָּה עֶבֶד הַכָּאָה שֶׁאֵין בָּהּ שְׁוֵה פְּרוּטָה לוֹקֶה. אֲבָל אִם יֵשׁ בָּהּ שְׁוֵה פְּרוּטָה הוֹאִיל וְהוּא חַיָּב לְשַׁלֵּם מָמוֹן אֵין אָדָם מְשַׁלֵּם וְלוֹקֶה כְּמוֹ שֶׁבֵּאַרְנוּ בְּכַמָּה מְקוֹמוֹת:
If the person receiving the lashes dies while receiving them, the attendant administering them is not liable. If he added another blow to the estimate arrived at by the judges and the person receiving the lashes dies, the attendant is exiled. If he does not die, the attendant is held liable for transgressing a negative commandment, as Deuteronomy 25:3 states: "Do not add." Similarly, any other person who strikes a colleague violates a negative commandment. If a person who was given permission by the Torah to strike a colleague is warned not to strike him more than is required to punish his wickedness, certainly, this applies with regard to other people. For this reason, whenever a person strikes a colleague - even a servant - with a blow for which the victim would not receive a p'rutah in damages, the offender should be lashed. If, however, the blow is worth a p'rutah in damages, the offender is not lashed. The rationale is that he is obligated to make financial restitution, and a person never both receives lashes and is required to make financial restitution, as explained previously in several places.