成唯識論述記 5.219

5.219

述曰：自下却解煩惱之名，因先列名及出體已方釋煩惱，此文勢也。今解「煩」字，擾者，亂；濁者，渾。此四常起擾濁內心，非如所餘六識中惑，擾濁他人等故，體是不善。今內緣故，令外六轉識恒成雜染。雜染之言，通三性有漏。

The Commentary states: From here down, it turns back to explain the term "affliction" (kleśa). Because it first listed the names and brought out the essential nature before explaining "affliction," such is the structure of the text. Here it explains the word "afflicting" (fán): to perturb means to disturb; to muddy means to obscure. These four constantly arise, perturbing and muddying the internal mind, not like the defilements in the remaining six consciousnesses that perturb and muddy other persons and so on, whose nature is unwholesome. Here, because they cognize internally, they cause the external six evolving consciousnesses constantly to become defiled. The word "defiled" (saṃkleśa) applies generally to the three natures of sāsrava.