7כָּל מוּעָד מְשַׁלֵּם נֵזֶק שָׁלֵם מִן הַיָּפֶה שֶׁבִּנְכָסָיו. וְכָל תָּם מְשַׁלֵּם חֲצִי נֵזֶק מִגּוּפוֹ. בַּמֶּה דְּבָרִים אֲמוּרִים בְּשֶׁנִּכְנְסָה הַבְּהֵמָה לִרְשׁוּת הַנִּזָּק וְהִזִּיקַתְהוּ. אֲבָל אִם נִכְנַס הַנִּזָּק לִרְשׁוּת הַמַּזִּיק וְהִזִּיקַתְהוּ בְּהֶמְתּוֹ שֶׁל בַּעַל הַבַּיִת הֲרֵי זֶה פָּטוּר עַל הַכּל. שֶׁהֲרֵי הוּא אוֹמֵר לוֹ אִלּוּ לֹא נִכְנַסְתָּ לִרְשׁוּתִי לֹא הִגִּיעַ לְךָ הֶזֵּק וַהֲרֵי מְפֹרָשׁ בַּתּוֹרָה (שמות כב ד) "וְשִׁלַּח אֶת בְּעִירֹה וּבִעֵר בִּשְׂדֵה אַחֵר":
Whenever [an animal] is mu'ad, [the owner] must pay the entire amount of the damage, [even if this requires expropriating] his most choice property. Whenever, by contrast, an animal is considered a tam, [the owner] is required to pay [only] half the amount of the damages. [Moreover,] that half is taken only from the animal itself. When does the above apply? When the animal entered into the domain belonging to the person to whom damage was caused, and caused damage. When, however, the person to whom damage was caused entered into the domain of the person [whose animal] caused the damage, [the owner] is not liable for anything. For he can tell [the party who suffered the damages]: "If you had not entered my domain, you would not have suffered any damages." Indeed, this is explicitly stated in the Torah, as [Exodus 22:4] states: "And if he shall send forth his animals, and they pasture in another's field."