律戒本疏 1.131

1.131

七十八輕他比丘墮　大德上坐說經法時。闡陀輕慢無敬畏心。不待說竟亂以異語。因是結戒。為作白四羯摩。記彼比丘不從敬事。凡聽說法及五篇教戒時。亂語不敬有二種僧。未記不敬事。而不教突。已記不敬犯墮。上坐不敬下坐。已記未記悉犯突吉羅。

78. Slighting another monk is a pāyattika. When a venerable elder was expounding the sūtra-dharma, Chanda was disrespectful and lacked reverence or fear; without waiting for the exposition to end, he disrupted it with irrelevant talk. On this account, the precept was formulated. A jñapti-caturtha-karman was performed for him, designating that monk as refusing respectful service. In general, when listening to the exposition of the Dharma and the instructions of the five categories of precepts, for disrespectful disorderly speech there are two kinds in the Saṃgha: before being designated for disrespectful conduct, failing to instruct is a duṣkṛta; after being designated, disrespect incurs a pāyattika. A senior being disrespectful to a junior, whether designated or not designated, in all cases incurs a duṣkṛta.