阿彌陀經疏 1.86

1.86

經曰：「千二百五十人俱」者，唱數也，謂常隨。舊謂如來所度三迦葉二外道師弟合有千二百五十人，為報佛恩恒隨給侍。今按名諱事恐不然，即如羅睺、大迦葉等常在其中，豈亦是彼之徒侶也。今據《長阿含》第一云：佛言劫將欲末諸物減損，如前迦葉佛一會說法弟子常二萬人，今我釋迦牟尼一會說法弟子有千二百五十人也。言俱者，《善見律》云：共在一處。

The sūtra says: “All twelve hundred and fifty of them.” This is stating the number, referring to the constant attendants. Formerly it was thought that the disciples of the three Kāśyapas and two non-Buddhist masters converted by the Tathāgata totaled twelve hundred and fifty persons, who constantly followed and served him to repay the Buddha's kindness. Now, checking against the names, it is feared that this matter is not so; for instance, Rāhula, Mahākāśyapa, and others were always among them—could they also have been disciples of those [masters]? Now, according to the first fascicle of the Dīrghāgama: “The Buddha said that when the kalpa is about to end, all things diminish; as when the former Buddha Kāśyapa preached the Dharma in one assembly, his disciples were always twenty thousand, whereas now I, Śākyamuni, when preaching the Dharma in one assembly, have twelve hundred and fifty disciples.” As for “together” (jù), the Samantapāsādikā states: “Dwelling together in one place.”