俱舍論記 4.123

4.123

「略說不善至有二十一」者，將明無記，略結不善四節煩惱。不善惡作十纏攝故，隨煩惱攝。

"In brief, unwholesome [...] there are twenty-one": about to explain the indeterminate (avyākṛta), it briefly summarizes the four classes of unwholesome defilements. Because unwholesome remorse is subsumed under the ten entanglements (paryavasthāna), it is subsumed under the secondary defilements (upakleśa).