三彌勒經疏 1.66

1.66

經曰「爾時世尊」以下，第二應佛說法。問：化佛何故談說甚深陀羅尼門？答：彌勒菩薩為得深陀羅尼門故。問：應佛說陀羅尼既足，何故須重化佛說？答：應化所說不虛為證故故。《法華經》猶恐他疑故，多寶佛塔踴為證而說。又《金光明經》恐他不信，故四佛現令信命。此亦爾也。百億者，基師云：「法義兩總持差別」。今云既經唯言百億而不簡忍呪故，通四總持差別無失。或有經云百萬億，或有經云百千萬億，恐非也。以諸講者皆釋百億故。

From the sūtra's words "At that time the World-Honoured One..." downward is the second [part], the response Buddha teaching the Dharma. Question: Why do the transformation Buddhas speak of the profound dhāraṇī gates? Answer: It was so that Bodhisattva Maitreya could attain the profound dhāraṇī gates. Question: Since the response Buddha's expounding of the dhāraṇī was already sufficient, why was it necessary for the transformation Buddhas to reiterate it? Answer: It was to provide confirmation that what is spoken by response and transformation [bodies] is not empty. In the *Lotus Sūtra*, still fearing that others would doubt, the Many Treasures Buddha Stūpa sprang forth to confirm and speak it. Furthermore, in the *Suvarṇaprabhāsa Sūtra*, fearing that others would not believe, the four Buddhas appeared to induce faith. Here it is also like this. As for "ten billion," Master Ji says: "[This refers to] the distinctions of the two total retentions of teaching and meaning." Now we say that since the sūtra merely says "ten billion" without excluding patient endurance and mantra, it applies without error to the distinctions of all four total retentions. Some sūtras say a hundred million, and some sūtras say a hundred trillion, which is probably incorrect, because all commentators explain it as ten billion.