釋氏要覽 3.402

3.402

涅槃經。佛滅度。諸聲聞弟子皆哭。未離欲者。皆宛轉于地。椎胸大叫。此並悲切痛極不省自身故○四分律云。尼椎胸啼哭。一一犯尼薩耆。比丘犯突吉羅○五百問云。比丘師亡。不得舉聲大哭應小小泣淚○凡釋子師亡。二親或喪。痛自心起。何有不哭。但不得縱聲。委曲并致詞。稱蒼天。罪逆之語。唯一往其聲哀哀而已。

The Nirvāṇa Sūtra says: When the Buddha attained extinction, the śrāvaka disciples all wept. Those who had not yet abandoned desire rolled upon the ground, beating their chests and crying aloud. These were all because their grief and anguish were extreme, and they were unaware of their own bodies. / The Four-Part Vinaya says: A nun who beats her chest and wails commits a niḥsargika-prāyaścittika for each instance; a monk commits a duṣkṛta. / The Five Hundred Questions says: When a monk's master dies, he must not raise his voice in loud weeping, but should shed tears softly. / Generally, when a Buddhist disciple's master dies, or both parents pass away, pain naturally arises in the heart; how could they not weep? However, they must not let loose their voices, go to elaborate lengths, or utter lamentations, crying out to the "Blue Heavens" or speaking of their "sins and transgressions." They should solely let forth a plaintive and sorrowful sound.