Mishneh Torah — Positive Mitzvot מצוות עשה, Chapter 237
The full Hebrew text of Mishneh Torah, Positive Mitzvot, Chapter 237, with English translation by Maimonides (Rambam).
לדון בנזקי בהמה, שנאמר: "וכי ייגוף שור איש את שור ריעהו" (שמות כא,לה).
To judge regarding the damages caused by an ox, as [Exodus 21:35] states: "If an ox belonging to one person gores an ox belonging to a colleague...."