俱舍論疏 15.55

15.55

論「三由重行至行善行惡」，第三因也。此業無依及非誓受，必須重行乃發無表。

On the text "Third, by weighty practice … doing good or doing evil": this is the third cause. This deed has no basis [such as a field] and is not accepted through a vow; it requires weighty practice for the unmanifest to be produced.