佛頂尊勝陀羅尼經教跡義記 2.90

2.90

唐云金剛藏也。解曰：金剛藏者，此是金剛頂瑜伽教也。謂從初發心精懃不退，積集萬行所證菩提，諸佛加持慈悲護念，事理堅密成金剛藏也。所謂金剛戒、金剛定、金剛慧、金剛鉤、金剛索、金剛鏁、金剛鈴、金剛杵，一一金剛塵沙供具，金剛香雲、華鬘、歌舞等，金剛無間、金剛解脫，登金剛座，成金剛菩提，總成金剛藏。以此真言加持有情令最堅牢，故名不壞堅固密藏也。

In Chinese, it means "adamantine treasury" (vajragarbha). The explanation states: As for "adamantine treasury," this belongs to the Vajraśekhara Yoga teaching. It means that from the initial aspiration of the mind, vigorously and without retrogressing, accumulating the manifold practices to realize bodhi, empowered by all Buddhas with compassionate mindful protection, phenomena and principle become firm and dense, forming the adamantine treasury. That is, the adamantine precepts, adamantine concentration, adamantine wisdom, the adamantine hook, adamantine noose, adamantine lock, adamantine bell, adamantine pestle (vajra), each and every adamantine offering implement countless as dust and sand, adamantine incense clouds, flower garlands, songs, dances, and so forth, the adamantine uninterrupted path, adamantine liberation, ascending the adamantine throne, and accomplishing adamantine bodhi—all together form the adamantine treasury. Empowering sentient beings with this mantra makes them most firm and solid; therefore it is called the indestructible and firm secret treasury.