7הַנּוֹקֵם מֵחֲבֵרוֹ עוֹבֵר בְּלֹא תַּעֲשֶׂה שֶׁנֶּאֱמַר לֹא תִקֹּם. וְאַף עַל פִּי שֶׁאֵינוֹ לוֹקֶה עָלָיו דֵּעָה רָעָה הִיא עַד מְאֹד. אֶלָּא רָאוּי לוֹ לָאָדָם לִהְיוֹת מַעֲבִיר עַל מִדּוֹתָיו עַל כָּל דִּבְרֵי הָעוֹלָם שֶׁהַכּל אֵצֶל הַמְּבִינִים דִּבְרֵי הֶבֶל וַהֲבַאי וְאֵינָן כְּדַאי לִנְקֹם עֲלֵיהֶם. כֵּיצַד הִיא הַנְּקִימָה. אָמַר לוֹ חֲבֵרוֹ הַשְׁאִילֵנִי קַרְדֻּמְךָ, אָמַר לוֹ אֵינִי מַשְׁאִילְךָ. לְמָחָר צָרִיךְ לִשְׁאֹל מִמֶּנּוּ, אָמַר לוֹ חֲבֵרוֹ הַשְׁאִילֵנִי קַרְדֻּמְךָ, אָמַר לוֹ אֵינִי מַשְׁאִילְךָ כְּדֶרֶךְ שֶׁלֹּא הִשְׁאַלְתַּנִי כְּשֶׁשָּׁאַלְתִּי מִמְּךָ, הֲרֵי זֶה נוֹקֵם. אֶלָּא כְּשֶׁיָּבוֹא לוֹ לִשְׁאֹל יִתֵּן בְּלֵב שָׁלֵם וְלֹא יִגְמל לוֹ כַּאֲשֶׁר גְּמָלוֹ. וְכֵן כָּל כַּיּוֹצֵא בָּאֵלּוּ. וְכֵן אָמַר דָּוִד בְּדֵעוֹתָיו הַטּוֹבוֹת (תהילים ז ה) "אִם גָּמַלְתִּי שׁוֹלְמִי רָע וָאֲחַלְּצָה" וְגוֹ':
One who takes revenge against his fellow transgresses a negative commandment, as it states (Deuteronomy 19:18), "Do not take revenge." And even though he is not given lashes, it is a very evil disposition. Rather, it is fitting that a person be indulgent above his instincts about all matters of the world - as to those that understand, they are all matters of vanity and emptiness and it is not worthwhile to take revenge for them. What is revenge? His fellow said to him, "Lend me your hatchet." He said [back] to him, "I will not lend [it] to you." The next day, [the fellow] needs to borrow from him: His fellow said to him, "Lend me your hatchet." He said [back] to him, "I will not lend to you, the [same] way you did not lend to me when I asked you." Behold, that is taking revenge. Rather, when [his fellow] comes to borrow, he should give it to him with a full heart, and not treat him like [the other] treated him. And so [too], all that is similar to these. And so did David say in his good characteristics (Psalms 7:5), "If I have dealt evil to my ally; and I who rescued, etc."