一部經，佛陀告訴行牛戒與行狗戒的兩位苦行者，模仿畜生的苦行只會導致墮入地獄或投生為畜，並進而開示黑業、白業等四種業及其果報。

A discourse in which the Buddha tells an ox-vow ascetic and a dog-vow ascetic that their animal-imitating practices lead only to rebirth in hell or as beasts, then explains the four kinds of action by their dark or bright outcomes.