三彌勒經疏 1.187

1.187

「若此眾中」以下，第二眾集所以。此中二：初長行答徒眾問、後頌其答長行。此中十三事，是皆示通三學，謂後言梵行八音即戒學也，四等心即定也，住出誦等則慧學。若初云梵行，通三學也。言四等心者，四無量定心也。善本者，三善根也。此十三事，皆通三會值彌勒因。言八關者，受八戒故。

From "If within this assembly..." onward is the second part, the reason why the assembly gathered. Here there are two parts: first, the prose answering the disciples' questions; second, the verses answering the prose. Here there are thirteen items, all of which illustrate the common permeation through the three trainings: that is, the later mention of "pure conduct and eight tones" is the training in morality; "four impartial minds" is concentration; and "dwelling, departing, reciting, and so forth" is wisdom. If "pure conduct" is mentioned first, it encompasses the three trainings. "Four impartial minds" refers to the four immeasurable concentrated minds. "Roots of goodness" refers to the three wholesome roots. These thirteen items are all causes for encountering Maitreya across the three assemblies. As for "the eight gates," it is because of receiving the eight precepts.