華嚴經探玄記 2.17

2.17

初定佛身者，問：此八會佛是何等身？答：有人釋云，是化身佛，以菩提樹下八相成道是化身故、不離昇天是重化故、以釋迦異名名盧舍那非別報身故。又有釋云：說此經佛是實報身，以是盧舍那法界身故、居蓮華藏淨土中故。下第七會初歎佛具彼二十一種殊勝功德，是實報也。但以不離化故，該此樹下非是化身。今釋：此佛准下文中是十佛之身，通三世間，以說十信及三賢等地前所見，非實報故。然居華藏，非局化故。國土身等，非前二故。具攝前二，性融通故具足主伴，如帝網故。是故唯是周遍法界十佛之身。

First, on determining the Buddha-body: Question: What kind of body is the Buddha of these eight assemblies? Answer: Some explain that it is the nirmāṇakāya Buddha, because attaining the Way with the eight aspects under the bodhi tree is the nirmāṇakāya, because not leaving yet ascending to the heavens is repeated transformation, and because Rocana is an alternative name for Śākyamuni and not a distinct saṃbhogakāya. Yet others explain: the Buddha who preaches this sūtra is the true saṃbhogakāya, because it is the Rocana dharmadhātu-body and resides in the Padmagarbha Pure Land. Below, at the beginning of the seventh assembly, praising the Buddha as possessing those twenty-one kinds of extraordinary merits refers to the true saṃbhoga[kāya]. It is merely because it does not depart from transformation that it covers this [seat] under the tree; it is not a nirmāṇakāya. Now I explain: according to the text below, this Buddha is the body of the ten Buddhas, pervading the three worlds, because what is seen by those prior to the bhūmis—namely the ten faiths, three stages of worthies, etc.—is not the true saṃbhoga[kāya]. Yet, residing in the Padmagarbha, it is not restricted to transformation. The land-body and others are not the preceding two. Because it fully gathers the preceding two, its nature interpenetrating, and because it is completely equipped with host and retinue, like Indra's net; therefore, it is exclusively the body of the ten Buddhas that universally pervades the dharmadhātu.