四分律行事鈔資持記 2.246

2.246

次明能非能者。如於此類眾生不能持，名非所能境；於彼類能持，名所能境；疏云：以屠者持野獸戒（即所能境，屠於家畜，為非所能。），獵者持家畜戒（亦所能也，獵以野獸為非所能。）。初科文中，上二句問起。謂於此類眾生，既非所能；今亦通緣，望彼發戒，有何所以。問意如是。由下，釋通。謂心無所簡，始相應故。

Next he explains capable and non-capable. For instance, being unable to maintain [the precepts] toward this class of sentient beings is called an 'incapable realm'; being able to maintain them toward that class is called a 'capable realm'. The Commentary states: 'Like a butcher maintaining precepts toward wild beasts (that is the capable realm; butchering domestic livestock is the incapable),' 'and a hunter maintaining precepts toward domestic livestock (this is also the capable realm; hunting wild beasts is the incapable).' In the text of the first heading, the upper two lines raise the question: toward this class of sentient beings, since it is not within one's capability, if one now also broadly takes them as the object to give rise to precepts with respect to them, what is the reason? Such is the sense of the question. From 'Because' downward, he resolves and clarifies it: it is because only when the mind has no exclusions does it first correspond.