三彌勒經疏 1.72

1.72

經曰「爾時兜率天上」以下，第二答淨穢。此中二：初廣辨廣麗以答淨穢、後結所因歎勝。初中三：初五億天子造外宮、次一大神作內法堂、後五大神嚴二宮。是初也。五億天者，是菩薩所變化，為預莊嚴故。約實雖具修十善而受天報，其施勝故偏說也。一生補處菩薩者，奘師云：「梵云彌底履，此云慧行。又利支，舊云彌勒，皆訛也。」此菩薩今身死生兜率，過多數死生還生彼天，最後死而生人方成佛，名一生補處。

From the sūtra passage stating, "At that time, in the Tuṣita heaven…" downward is the second [part], answering about purity and defilement. This has two parts: first, extensively detailing the vast magnificence in order to answer regarding purity and defilement; second, concluding with the causes and praising its superiority. In the first part, there are three: first, five hundred million devaputras create the outer palace; next, a great spirit creates the inner Dharma hall; and last, five great spirits adorn the two palaces. This is the first.

The five hundred million devas are emanations of the Bodhisattva, created to adorn it in advance. In terms of actuality, although they fully cultivate the ten virtuous actions and receive heavenly fruition, because their giving is superior, it is specifically spoken of. Regarding "the one-life-remaining bodhisattva," Master Xuanzang says: "In Sanskrit it is *Maitrī*, which here translates as 'Benevolent Practice' (or 'Practitioner of Wisdom'). Also *Medī*, previously translated as Maitreya, are all errors." This Bodhisattva dies in his present life and is born in Tuṣita; after passing through many deaths and rebirths, he is reborn in that heaven, and after a final death he is born among humans and only then attains Buddhahood, which is called 'one life remaining' (ekajātipratibaddha).