大方廣佛華嚴經隨疏演義鈔 2.23

2.23

疏第九「是以菩薩搜祕於龍宮」下，感慶逢遇。於中二：一明弘闡源由、二正明感遇。今初。謂龍樹菩薩五百年外，方入龍宮搜求，得斯玄奧之典，事如別傳及《纂靈記》。言「大賢闡揚於東夏」者，正取覺賢兼餘大德，謂智嚴、法業、日照、實叉等闡揚斯典。言於東夏者，謂葱嶺之東，地方數千里，謂之神州大夏。而上云是以者，由上深妙故，搜以闡之。故龍樹入於龍宮，廣見無數偏誦此經者，以玄妙故。故《智論》詺為大不思議經。而諸大德皆見此經一文一句竭海墨而莫書，一偈一光破地獄之劇苦，是以諸師盡命弘傳耳。

In the Commentary, the ninth part, from "Therefore the Bodhisattva searched for the secret in the Dragon Palace" onward, expresses feelings of rejoicing at having encountered it. Within this there are two: first, clarifying the origins of its propagation; second, directly expressing feelings about encountering it. Now for the first. It means that more than five hundred years [after the Buddha's demise], Bodhisattva Nāgārjuna finally entered the Dragon Palace to search and seek, and obtained this profound and abstruse scripture, as recorded in separate biographies and the Zuānlíng jì. As for "Great sages expounded it in the Eastern Xia," this specifically refers to Buddhabhadra alongside other venerable figures, meaning that Jñānagupta, Faye, Divākara, Śikṣānanda, and others expounded this scripture. "In the Eastern Xia" means east of the Congling (Pamir) Mountains, a region of thousands of li, called the Divine Land of the Great Xia. What was stated above as "therefore" is because, being so deep and wondrous, it was searched out to be expounded. Thus Nāgārjuna entered the Dragon Palace and saw countless [texts], but specifically chanted this sūtra because it was profound and wondrous. Hence the Dàzhìdù lùn names it the Great Inconceivable Sūtra. Furthermore, all the venerable masters saw that in this sūtra, a single phrase or line could not be written even if the ink of the ocean were exhausted, and a single verse or ray of light shatters the severe torments of the hells; therefore, the various masters dedicated their lives to propagating it.