大般涅槃經疏 23.8

23.8

「云何修戒」下，第三釋戒，文為二：一離惡戒，即牛狗等，並取其相而為護持。外道得通者，見牛狗等死後生天，便學彼行望得生天；餘皆例爾。次得善戒，如文。

From "How is morality cultivated?" onwards, thirdly, he explains morality, and the text has two parts: first, the morality of abandoning evil, namely [the vows of] cows, dogs, and the like, all grasping at their marks and keeping them. Non-Buddhists who attained supernormal powers saw that cows, dogs, and the like were reborn in heaven after death, and thereupon emulated their conduct in the hope of attaining rebirth in heaven; the rest are all analogous to this. Next is attaining good morality, as in the text.