四分比丘戒本疏 2.144

2.144

五者拘那含牟尼略。彼佛世人多樂放蕩，執以邪論，若他所破便懷憂慼。為對治彼，故制戒云「心莫作放逸」者，離邪論也。「聖法當懃學」，學正論也。「如是無憂愁」者，學正論者法爾心喜，喜故身安，安故心定，定故涅槃。餘文可知。

Fifth is the abbreviated [prātimokṣa] of Kanakamuni [Buddha]. The people of that Buddha's era mostly took pleasure in dissipation, adhering to deviant treatises, and if refuted by others, they harbored sorrow and grief. To counteract that, he therefore instituted the precept, saying, "Do not let the mind become heedless," which is to abandon deviant treatises. "The noble Dharma should be diligently studied" is to study correct treatises. "Thus being free of sorrow" means that for those who study correct treatises, it is natural for the mind to rejoice; because of joy, the body is at ease; because of ease, the mind is concentrated; because of concentration, there is nirvāṇa. The rest of the text can be understood.