א֣וֹ נוֹדַ֗ע כִּ֠י שׁ֣וֹר נַגָּ֥ח הוּא֙ מִתְּמ֣וֹל שִׁלְשֹׁ֔ם וְלֹ֥א יִשְׁמְרֶ֖נּוּ בְּעָלָ֑יו שַׁלֵּ֨ם יְשַׁלֵּ֥ם שׁוֹר֙ תַּ֣חַת הַשּׁ֔וֹר וְהַמֵּ֖ת יִֽהְיֶה־לּֽוֹ׃ (ס)
或者，若是人都知道那牛向來有牴人的習性，牠的主人卻不把牠看管好，他就必須賠償，以牛償牛；死了的牛要歸他。
Mishnah Bava Kamma
Five [agents of damage] rank as harmless and five as an attested danger. Cattle are not an attested danger to butt, push, bite, lie down, or kick. The tooth [of an animal] is an attested danger to eat that which is for it; The leg [of an animal] is an attested danger to break [things] as it walks along; So also is a warned ox [an ox that has gored before]; And an ox that damages in the domain of the damaged party, and human beings. The wolf, the lion, the bear, the leopard, the panther and the snake all rank as attested danger. Rabbi Eliezer says: When they are tame they are not attested danger, but the snake is always an attested danger. What is the difference between that which is harmless and that which is an attested danger? The harmless pays half-damages from its own body and the attested danger pays full damages from the best property (of its owner and guardian).
Mishnah Ketubot
He who declares, “I seduced the daughter of so-and-so” must pay compensation for embarrassment and blemish on his own admission but need not pay the fine. He who declares, “I have stolen” must make restitution for the principal on his own evidence but need not repay double, fourfold or fivefold. [He who declares,] “My ox has killed so-and-so” or “the ox of so-and-so” must make restitution on his own evidence. [If he said] “My ox has killed the slave of so-and-so” he need not make restitution on his own evidence. This is the general rule: whoever pays more than the actual cost of the damage he has done need not pay it on his own evidence.
Mishnah Bava Kamma
If one handed it to an unpaid guardian, or to a borrower, or to a paid guardian, or to a hirer, they take the place of the owners; if the beast was an attested danger he pays full damages, and if it was accounted harmless he pays half damages. If its owner had tied it with a halter, or locked it up properly, but it came out and caused damage, the owner is liable, whether it was an attested danger or accounted harmless, these are the words of Rabbi Meir. Rabbi Judah says: “If it was accounted harmless he is liable, but if it was an attested danger he is exempt, as it says, “and its owner did not guard it”, but this one has been guarded. Rabbi Eliezer says: “Its only guarding is the knife.”