淨名經集解關中疏 2.383

2.383

有以佛所化人而作佛事　大論云須扇頭佛當日成道。當日入涅槃。留化佛度眾生也。皆此比也。

"There are those that perform Buddha-activities through people transformed by the Buddha." / The *Dàzhìdù lùn* says that the Buddha Suśānta attained enlightenment on the very day and entered nirvāṇa on that very day, leaving transformed Buddhas to deliver sentient beings. All are of this kind.