俱舍論記 15.56

15.56

「捨近住戒至由五緣捨」者，捨近住戒由前四緣，又加夜盡，故說別解總五緣捨。何名夜盡？《正理》云「夜盡者，謂明相出時。」

Regarding the passage "Abandoning the upavāsa morality... abandoned through five conditions": abandoning the upavāsa morality is through the aforementioned four conditions, with the addition of the passing of the night; hence it is said that the prātimokṣa is abandoned through five conditions in total. What is called "the passing of the night"? The Nyāyānusāra states: "The passing of the night refers to the time when the light of dawn appears."