俱舍論記 16.6

16.6

「諸不善業至不可意故」者，釋惡名黑。不善名惡，黑謂黑黑。諸不善業一向名黑，染污性故。異熟亦黑，不可意故。諸不善業亦應名不可意，影顯可知，略而不說。故《婆沙》一百一十四云「黑有二種，一染污黑、二不可意黑。此中業由二黑故說名為黑，異熟但由不可意黑故亦名黑。

"All unwholesome actions ... because they are disagreeable": this explains bad as named black. Unwholesome is called bad; black means black-black. All unwholesome actions are invariably called black because of their defiled nature. Their ripening is also black because it is disagreeable. All unwholesome actions should also be called disagreeable; this is understood implicitly by reflection, and is omitted without being stated. Thus fascicle 114 of the Mahāvibhāṣā states: "There are two kinds of black: first, defiled black; second, disagreeable black. Here, action is called black on account of both kinds of black; ripening is also called black solely on account of disagreeable black."