瑜伽師地論略纂 12.148

12.148

論云「超過第七雜清淨住，得入第八純清淨住」者，以有漏心隔名雜，純無漏名純淨，此八地已上。相續家釋：七地有功用故名雜，八地無故名純。言隔不隔，此八地已去，有漏心間起家義。

The treatise says: "Transcending the seventh mixed-pure abode, one attains entry into the eighth purely pure abode." Because being interrupted by contaminated mind is called mixed, purely uncontaminated is called purely pure; this is from the eighth bhūmi upward. The continuum masters explain: because the seventh bhūmi involves effort it is called mixed, and because the eighth bhūmi lacks it, it is called pure. As for interrupted or uninterrupted, this is the doctrine of the school that from the eighth bhūmi onward, contaminated mind arises intermittently.