大毘盧遮那成佛經疏 3.26

3.26

經云「世尊一切支分皆悉出現如來之身」者，前現莊嚴藏時，普門一一身各遍十方，隨緣應物。今欲說漫荼羅圓位故，還約佛身上中下體，以部類分之。自齊以下，現生身釋迦示同人法，及二乘六趣種種類形色像威儀，言音壇座各各殊異，及其眷屬展轉不同，普於八方如漫荼羅本位次第而住。自齊以上至咽，出現無量十住諸菩薩各持三密之身，與無量眷屬，普於八方如漫荼羅本位次第而住。然此中自有二重：從心以下，是持大悲萬行十佛剎微塵諸大眷屬；從心以上，是持金剛密慧十佛剎微塵諸內眷屬，通名大心眾也。從咽以上至如來頂相，出現四智四三昧果德佛身。即此八身，於一切世界中，徒眾、剎土、名號、身業、諸受用事皆悉不同，亦於八方如漫荼羅本位次第而住。

Regarding the sūtra saying, "From all parts of the Bhagavat's body, bodies of the Tathāgata appeared everywhere": earlier, when displaying the adornment matrix, each and every body of universal gateways pervaded the ten directions, responding to beings according to conditions. Now, wishing to speak of the complete positions of the maṇḍala, [the sūtra] in turn divides them by classes according to the upper, middle, and lower parts of the Buddha's body. From the navel downward, he manifested the physical body of Śākyamuni, demonstrating conformity with human norms, as well as the diverse forms, colors, images, and deportments of the two vehicles and the six destinies, whose voices, speech, and platforms were each distinct, and whose retinues varied successively, dwelling in the eight directions according to their proper order within the original positions of the maṇḍala. From the navel upward to the throat, there appeared countless bodhisattvas of the ten abodes, each maintaining bodies of the three mysteries, together with countless retinues, dwelling in the eight directions according to their proper order within the original positions of the maṇḍala. However, within this there are inherently two levels: from the heart downward are the great retinues [as numerous as] the fine dust motes of ten Buddha-kṣetras who maintain the myriad practices of mahākaruṇā; from the heart upward are the inner retinues [as numerous as] the fine dust motes of ten Buddha-kṣetras who maintain the secret wisdom of the vajra; they are collectively named the Assembly of the Great Mind. From the throat upward to the Tathāgata's uṣṇīṣa, there appeared the Buddha bodies of the fruition-virtues of the four wisdoms and four samādhis. These eight bodies themselves—in all world realms, their retinues, lands, titles, bodily actions, and all matters of enjoyment are completely distinct—likewise dwell in the eight directions according to their proper order within the original positions of the maṇḍala.