阿彌陀經通贊疏 1.28

1.28

說之所由者，如《大術經》等說其本緣。佛臨涅槃時，佛令有疑當問，時優婆離、阿𮋢樓馱教阿難問四事：一、佛滅度後諸比丘等以誰為師；二、依何處而住；三、惡性比丘如何治罰；四、一切經首當置何言？佛言：我滅度後，以波羅提木叉為汝大師，依四念處安止其心，惡性比丘梵檀治之，此云默然，故不應打罵但默擯故，四一切經首當置如是我聞等言。後阿難結集，還依佛教故也。

As for the reason for speaking it: As expounded in the *Great Skill Sūtra* and others regarding its original circumstance, when the Buddha was approaching parinirvāṇa, the Buddha instructed that if there were any doubts, they should ask. At that time Upāli and Aniruddha instructed Ānanda to ask four questions: First, after the Buddha's parinirvāṇa, whom shall the monks take as their teacher? Second, relying upon what place shall they dwell? Third, how should evil-natured monks be punished? Fourth, what words should be placed at the head of all sūtras? The Buddha said: 'After my parinirvāṇa, take the prātimokṣa as your great teacher; calm and settle your minds relying on the four stations of mindfulness; punish evil-natured monks with the brahmadanda'—translated here as silence, meaning one should not beat or scold them, but simply ostracize them in silence—'and fourth, at the head of all sūtras you should place the words: "Thus have I heard" and so forth.' Later, when Ānanda compiled the teachings, he followed the Buddha's instruction.