俱舍論記 18.129

18.129

「或有諸業至例此應思」者，此下釋後半頌。此即別顯作業重也。或有諸業唯由後起所攝受故，得成重品，以定立彼異熟果故。於後起中後起重者，非餘輕品。或有諸業由田成重，如於恩德田等為損為益，非餘人等。或有於田由根本力成重非餘，即指事云：如父、母田行殺罪重成無間業，非於父、母作盜等業成無間罪。此即約田顯根本重。略釋三種，由餘加行及思、意樂諸業成重，例此應思。

Regarding "Or there are actions... one should consider other cases by this analogy": what follows explains the latter half of the verse. This specifically clarifies that performing actions is heavy. Or there are actions that become of the heavy grade solely through being embraced by subsequent action, because they definitively establish their result of maturation. Among subsequent actions, the heavier subsequent action is not like other light grades. Or there are actions that become heavy by reason of the field, as when doing harm or benefit to the fields of gratitude or virtue, unlike toward other ordinary persons. Or there are cases where, with respect to the field, an action becomes heavy through the power of the fundamental [act] and not otherwise, pointing directly to concrete events: for example, committing the sin of killing with respect to the field of father or mother is heavy, constituting an immediate karma (ānantarya-karma), but committing theft and so forth with respect to father or mother does not constitute an immediate sin. This clarifies that the fundamental action is heavy with reference to the field. Having briefly explained these three, that actions become heavy through the remaining preparatory application, volition, and intent should be considered analogously.