四分戒本疏卷第一．第二．第三 2.95

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有難蘭若離衣六宿戒二十九　此戒同異如前已辯。但前戒聚落清第一宿即犯。此蘭若險怖過六夜犯。前是常流人有德衣開。此是有難。又兼勝行。不受德衣。但有迦提。以非作故此二開限。別緣有七。一受持三衣。二冬分非時。故律云。夏三月竟迦提月滿。三有極怖處。四置衣在聚落。五不捨會。六無因緣。七第七日明相出便犯。已下正明戒本。此因六群比丘寄衣遊行。同徒舉過。佛便制戒。

The Precept on Spending Six Nights Away from One's Robes in a Perilous Āraṇya (the twenty-ninth). The similarities and differences of this precept have already been distinguished above. However, for the former precept, staying overnight in a village immediately incurs an offense on the very first night; in this perilous āraṇya, an offense is incurred only after exceeding six nights. The former applies to ordinary persons with the permission of the virtue robe (kaṭhina); this one involves perils and furthermore combines with superior conduct, where one does not receive the virtue robe, but only has the kaṭhina season; because it is not formally made, there are these two permitted limits. There are seven specific conditions: first, resolving upon and holding the three robes; second, the non-season of the winter division—therefore the Vinaya states: after the three months of summer have finished and the kaṭhina month is full; third, having an extremely terrifying place; fourth, leaving the robe in a village; fifth, not relinquishing it through gathering; sixth, lacking a justifying circumstance; seventh, when the break of dawn appears on the seventh day, the offense is incurred. The following directly explains the precept text. This arose because the group of six bhikṣus deposited their robes and went traveling, and their companions pointed out their fault; the Buddha then formulated the precept.