瑜伽論記 21.129

21.129

第十明八相中，成正覺轉法輪大涅槃三種皆無二相。意謂如來法身無此三相，對緣變動，名究竟淨，如來化身對緣變動，常示現故，有此三相。

Tenth, clarifying that among the eight marks [of the Buddha's life], the three kinds—attaining right awakening, turning the wheel of the Dharma, and great parinirvāṇa—all have no duality. The meaning is that the Tathāgata's Dharma body is devoid of these three marks and changes in response to conditions, being called ultimate purity; because the Tathāgata's emanation body constantly manifests changes in response to conditions, it has these three marks.