成唯識論述記 9.634

9.634

述曰：信亦上品，通漏、無漏。現觀者，是惠現觀諸法，以信助現觀令不退故，亦名現觀。有處但說無漏者，以勝故立為不壞信故。

The Commentary states: Faith is also superior, extending across the contaminated and uncontaminated. As for 'clear realization', it is wisdom that clearly realizes all phenomena; because faith assists clear realization so that it does not regress, it is also called clear realization. Where some texts speak only of uncontaminated faith, it is because it is superior and established as indestructible faith (avetyaprasāda).