成唯識論演祕 7.330

7.330

按彼論云：於無相住中，四種災患今悉除斷。一者、於無相中有加行、有功用事；二者、於上清淨住精勤思慕；三者、於一切種利有情事，有大堪能，精勤思慕；四者、有微細想現在前行，故是此住名「極清淨」。

According to that treatise: In the station of the signless, four kinds of afflictions are now completely eliminated. First, having effort and intentional activity within the signless; second, diligently desiring the superior, pure station; third, having great capability for, and diligently desiring, the benefit of sentient beings in all ways; fourth, having subtle ideations actively occurring. Therefore, this station is called 'utterly pure'.