大方廣佛華嚴經隨疏演義鈔 63.101

63.101

疏「六起淨土行」，論重釋云「云何莊嚴？無煩惱染，得堅固智慧眾生住在其中，及佛法莊嚴故」者，意云：淨土有三種淨。一相淨，七珍嚴等，易故不明；二住處眾生淨、三法門流布淨，後二難故，論重出之。既發意能成，即具三淨之因，廣如初地淨土願中。

Regarding the commentary's: "Sixth, practice that gives rise to pure lands," where the Treatise explains again: "How is it adorned? Free from the defilement of afflictions, beings who have attained firm wisdom dwell within it, and it is adorned by the Buddha-dharma": The meaning is that a pure land has three kinds of purity: first, purity of characteristics—adornment with the seven treasures and so on—which is easy, and therefore not explained; second, purity of the beings in the dwelling place; third, purity of the dissemination of Dharma gates. Because the latter two are difficult, the Treatise brings them out again. Since generating the intention can accomplish them, this is endowed with the causes of the three purities, as extensively detailed in the pure land vows of the First Ground.