俱舍論疏 4.116

4.116

論「於未作事至是我惡作」，答也。謂即不作亦名惡作。如有人言：「我於今日不施此物，是我惡作。」此即是作，此之不作亦名惡作。《婆沙》三十七云「此中惡作總有四句：一有惡作是善，於不善處起。二有惡作是不善，於善處起。三有惡作是善，於善處起。四有惡作是不善，於不善處起。」

[Regarding the phrase of] the treatise, "Regarding what has not been done... 'is my bad deed'," this is the answer. That is, non-doing is also called 'badly done.' As when someone says: 'My not giving this item today is my bad deed.' This is precisely doing; this non-doing is also called 'badly done.' The Vibhāṣā, fascicle 37, says: 'Herein, regret has four permutations in total: 1. There is regret that is wholesome, arising with respect to an unwholesome locus. 2. There is regret that is unwholesome, arising with respect to a wholesome locus. 3. There is regret that is wholesome, arising with respect to a wholesome locus. 4. There is regret that is unwholesome, arising with respect to an unwholesome locus.'