淨名經集解關中疏 2.286

2.286

於是舍利弗心念。日時欲至。此諸天子菩薩當於何食　此二淨穢雙遊明中道用也。香積釋迦法身平等應物緣殊淨穢異也。品文三。一假緣念飯。二淨穢互遊。三聞品得益。初文三。初念。次呵。後許。此初念也。什曰。舍利弗獨發念者其旨有三。一者結業之體未能無資。二絕意大方樂法不染。三推己有待謂眾亦然。處弟子之上宜為眾致供也。

Thereupon Śāriputra thought to himself, “The mealtime approaches. Where shall these sons of the devas and bodhisattvas eat?”
This [chapter] is the second, “Roamings Across Both Pure and Impure,” which clarifies the application of the middle way. For Gandhahastin and Śākyamuni, the dharmakāya is equal, but in responding to beings' conditions they differ, so pure and impure are distinct. The chapter text has three parts: first, taking conditions to think of food; second, mutually roaming in pure and impure [lands]; third, hearing the chapter and gaining benefit. The first section has three parts: first, the thought; next, the rebuke; last, the permission. This is the initial thought. [Kumāra]jīva says: “That Śāriputra alone gave rise to this thought has three purposes: first, the body of defilements and karma cannot yet be without sustenance; second, renouncing concern for the Great Method, he delights in the Dharma without attachment; third, projecting his own dependence, he assumed the assembly was likewise. Occupying the foremost position among disciples, it was appropriate for him to procure an offering for the assembly.”