四分比丘戒本疏 2.39

2.39

Seventh: the precept against speaking of another's gross offences to an unordained person. 'Except by Saṃgha-karma': according to the Vinaya, when Devadatta was about to cause a schism in the Saṃgha, the Buddha ordered a ñattidutiya-kamma to appoint Śāriputra to declare his faults beforehand among the assembly of white-robed laity; therefore it was not an offence. The sixth fascicle of the Sarvāstivāda-śāstra says: 'Better to destroy a stūpa and break an image than speak of a monk's faults to an unordained person; if one speaks of them, one destroys the Dharmakāya.'