成唯識論述記 5.326

5.326

述曰：煩惱起時，心必馳流於境縱蕩，非如善位。此何為也？皆由於境起散亂，故方流蕩也。諸論解散亂皆言「不寂」。不寂者，流蕩之義，與此理同，故此三法遍諸染心，無無此三而成染者。

The Commentary states: When afflictions arise, the mind inevitably rushes toward objects and dissipates, unlike in virtuous states. Why is this? It is because it generates distraction toward objects that it then wanders and dissipates. When various treatises explain distraction, they all say 'unpeaceful'. 'Unpeaceful' has the meaning of wandering and dissipation, which agrees with this principle. Therefore, these three factors pervade all defiled minds; there is no mind that becomes defiled without these three.