律戒本疏 1.136

1.136

八十三我始知是事入戒經中　闡陀比丘犯可悔罪。諸比丘教令悔。作如是答。我先未知。今始知。欲望不犯也。然諸比丘知其數聞。但知已二三說所不知復過。於是是闡陀非不知而得脫所犯事。所犯事隨其所作而得罪也。又若久知而言。始知即犯。九十事初忘語戒也。又若實不知必由聽時不專。聽時不專則犯墮也。今此中正以聽不專為罪也。說五篇戒及隨律經時不專聽。一一犯墮。若說餘經及一切羯磨時不專聽。一一突。臨壇十人不誦羯磨悉犯突。若彼錯誤無想正故。

Eighty-three: [Saying,] "Only now do I know that this matter is included in the Prātimokṣa Sūtra":
Chanda the monk committed a confessable offense. The monks instructed him to confess, but he replied thus: "I did not know it before; only now do I know it," wishing thereby not to be at fault. However, the monks knew that he had heard it many times; only, knowing that it had already been proclaimed two or three times, his claim not to know was an additional transgression. Thereupon, Chanda could not escape the offense committed by pleading ignorance; regarding the offense committed, he incurs the penalty according to what he did. Furthermore, if he knew it long before but says he has only now learned of it, he immediately violates the precept against lying, the first of the ninety offenses. Moreover, if he truly did not know, it must have been because he was inattentive when listening; being inattentive when listening constitutes an offense of pāyattika. Here, in this context, the offense is precisely due to inattention when listening. When the five sections of precepts and the sūtras conforming to the Vinaya are being recited, being inattentive incurs a pāyattika in each case. When other sūtras and any formal saṃgha act (karman) are being recited, being inattentive incurs a duṣkṛta in each case. If the ten persons at the ordination platform do not recite the karman, they all incur a duṣkṛta, because if they make mistakes, there will be no correct mindfulness.