1. The training rule on masturbation
Sukkavisaṭṭhi
A monk who intentionally ejaculates is to be suspended. The introductory narrative to this and the next four rules, as well as a number of other rules in the monastic code, feature the monk Udāyī, who had a serious problem with keeping his sexual urges in check. Either that or he is a literary stand-in for the real offenders.
Translations
6. Building a hut inappropriately
Kuṭikāra
When a monk builds a hut by means of begging, he must get the Order to approve the site and the hut must not exceed the maximum size limit. A monk who breaches either of these conditions is to be suspended. The origin story to this rule includes the Maṇikaṇṭha Jātaka tale, found in a slightly different form in the Jātaka collection. There is also another edifying tale and an apparent reference to Raṭṭhapāla of the Raṭṭhapāla Sutta, MN82.
Translations
8. Making a groundless accusation out of anger
Duṭṭhadosa
A monk who in anger falsely accuses another monk of an offense entailing expulsion is to be suspended. The background narrative to this rule features the extraordinary monk Dabba the Mallian who became an arahant at the age of seven.
Translations
13. Being a corrupter of families
Kuladūsaka
A monk who causes the lay people in a certain place to lose confidence in the teachings of the Buddha should be banished from that place. If he refuses to accept the banishment, he is to be suspended. The introduction to this rule tells of the corrupt and merciless group of six monks, who were the offenders behind a large number of rules in the monastic code.