四分比丘戒本疏 1.34

1.34

次解第二篇，文分為三：初明所依教、二列罪名相、三結已審持。故漏失戒，律中犯境總有六種：一內色，謂有情色。二外色，謂非情。三內外色，謂二色合。四水，謂逆順水而動身。五風、六空，准水應知。除夢中者，不犯殘罪。而亂意眠，律有五過：一者惡夢、二者諸天不護、三心不入法、四不思惟明相、五夢中失精。《五分律》中亂意眠得吉羅。《善見》云「若比丘心想而眠，先作方便，脚挍手握作想而眠，在夢精出得僧殘罪。」戒文開者，開先無方便故也。

Next, the second category [of offences] is explained. The text is divided into three: first, clarifying the teaching on which it relies; second, listing the names and characteristics of the offences; third, concluding by examining whether they have been maintained. Regarding the precept on intentional emission [of semen], the Vinaya has six kinds of objects of transgression in total: first, internal form, which refers to the form of sentient beings; second, external form, which refers to insentient things; third, internal-external form, which refers to the combination of the two forms; fourth, water, which refers to moving one's body with or against the flow of water; fifth, wind, and sixth, empty space, which should be understood by analogy with water. If it occurs in a dream, it is excluded and does not incur a saṃghāvaśeṣa offence. However, sleeping with a distracted mind has five faults in the Vinaya: first, evil dreams; second, the devas do not protect one; third, the mind does not enter the Dharma; fourth, not contemplating the appearance of light; fifth, emission of semen in a dream. In the Mahīśāsaka-vinaya, sleeping with a distracted mind incurs a duṣkṛta. The Samantapāsādikā states: "If a monk sleeps while harboring mental imagery, having first made preliminary preparations, crossing his legs, clenching his hands, and sleeping with such imagery, if semen is emitted during a dream, he incurs a saṃghāvaśeṣa offence." That the precept text grants an exception is because it exempts cases where there was no preliminary preparation beforehand.