大毘盧遮那成佛經疏 6.157

6.157

經本第二卷初云「爾時毘盧遮那世尊與一切諸佛同共集會，各各宣說一切聲聞緣覺菩薩三昧道」者，如來已說究竟三空三昧印，為令普門進趣者無留難故，復說三昧道中差別印。三重漫荼羅所示種種類形，皆是如來一種法門身，是故悉名為佛。此等一切諸佛，各於本所流通法門自說彼三昧道，若現世天身者則說彼天三昧道，若現聲聞身者則說聲聞三昧道，若現辟支佛身者則說辟支佛三昧道，若現菩薩身者則說菩薩三昧道，若現持金剛身者則說金剛三昧道。當知此中偈頌如是無量剎塵，非世間結集經卷所能具載。然諸行人若深入瑜伽境界三昧時，自當了了聽聞，如正說時無異，是以故名為佛加持日也。

Where the beginning of the second fascicle of the root sūtra states, "At that time the Bhagavat Vairocana assembled together with all buddhas, and each proclaimed the samādhi paths of all śrāvakas, pratyekabuddhas, and bodhisattvas," [it means that] the Tathāgata, having already expounded the ultimate mudrā of the threefold emptiness samādhi, then expounded the differentiated mudrās within the samādhi paths in order that those advancing through the universal gateway should encounter no impediments. The various diverse forms displayed in the triple maṇḍala are all single Dharma-gate bodies of the Tathāgata, and therefore are all named "buddha." Each of these buddhas, in the Dharma gateway originally propagated by them, himself expounds that samādhi path: if manifesting the body of a worldly deva, he expounds that deva's samādhi path; if manifesting the body of a śrāvaka, he expounds the śrāvaka samādhi path; if manifesting the body of a pratyekabuddha, he expounds the pratyekabuddha samādhi path; if manifesting the body of a bodhisattva, he expounds the bodhisattva samādhi path; if manifesting the body of a vajradhara, he expounds the vajra samādhi path. One should know that the verses here are as countless as the dust particles of buddha fields, not something that could be fully recorded in worldly compilations of sūtra scrolls. However, when practitioners deeply enter the samādhi of the yoga realm, they will naturally hear them clearly, no different from when they were being spoken, which is why it is called "the day of the Buddha's adhiṣṭhāna."