律戒本疏 1.103

1.103

五十知他麁罪覆藏至一夜犯墮　凡無慚愧。輕慢心犯五篇戒。隱覆不悔。能障聖道通名麁也。今言麁罪。謂初二篇也。跋難陀兄名難徒。難徒犯麁罪。弟為覆藏之。難陀弟子名達摩。達摩向眾發其麁罪。而難徒為緣弟墮隱覆不說。由達摩白眾。因制不聽覆他麁罪。尼覆他八重即犯重。比丘覆他重及殘悉犯墮。覆他下三篇犯突。覆麁罪未至明犯突。至明相出悉犯波逸提。

Fifty: knowing of another's grave offense and concealing it for up to one night is an offense of pāyattika. In general, to lack shame, and with a slighting and disrespectful mind commit an offense in the five categories of precepts, concealing it without repenting, which can obstruct the noble path—this is generally called "grave." Here, "grave offense" refers to the first two categories [pārājika and saṃghāvaśeṣa]. Upananda's elder brother was named Nanda. Nanda committed a grave offense, and the younger brother concealed it for him. Nanda's disciple was named Dharma. Dharma disclosed his grave offense to the assembly, but Nanda, because of his younger brother, fell into concealing it without speaking out. Because Dharma informed the assembly, it was consequently instituted that one is not permitted to conceal another's grave offense. A nun concealing another's eight pārājikas immediately commits a grave offense [pārājika]. A monk concealing another's pārājika or saṃghāvaśeṣa commits an offense of pāyattika in every case. Concealing another's lower three categories is a duṣkṛta. Concealing a grave offense before dawn breaks is a duṣkṛta; once the signs of dawn appear, it is in every case a pāyattika.