俱舍論記 5.151

5.151

「住是有情至四有為相」者，答。為令厭住與異合說，如示黑耳與吉祥俱，為厭吉祥先示黑耳。黑耳、吉祥姊妹二人常相隨逐。姊名吉祥，所至之處能為利益。妹為黑耳，由耳黑故故以名焉，所至之處能為衰損。愚人貪染吉祥，智者欲令厭捨，先示黑耳。既見黑耳，吉祥亦捨。舊云功德天、黑闇女，譯家謬矣。住、異亦爾，為令厭住與異合說，是故定有四有為相。

On "Staying is what sentient beings... four conditioned characteristics": this answers. To cause revulsion toward staying, it is spoken of together with decaying, just as pointing out Kālakarnī together with Śrī: to cause revulsion toward Śrī, one first points out Kālakarnī. Kālakarnī and Śrī are two sisters who constantly accompany one another. The elder sister is named Śrī; wherever she arrives, she can bring benefit. The younger sister is Kālakarnī; because her ears are black, she is named accordingly; wherever she arrives, she can bring decline and ruin. Foolish people crave and are attached to Śrī; a wise person wishing to cause them to abandon her in disgust first shows Kālakarnī. Having seen Kālakarnī, they also abandon Śrī. The old renderings as "Goddess of Merit" and "Dark Woman" were translator errors. Staying and decaying are just like this: to cause revulsion toward staying, it is spoken of together with decaying; therefore, there are definitively four conditioned characteristics.