俱舍論疏 14.115

14.115

「論曰至齋竟亦得受」，釋受時也。准此論文，先無要期者，齋後受戒不得。又准此，齋前總名晨旦。《正理論》云「受此律儀必須晝夜，謂至明旦日初出時。」《婆沙》一百二十四云「一晝一夜不增不減，謂清旦時從師受得，至明清旦律儀便捨。乃至時分定故，光、闇往來易了知故。」

"The treatise says ... it may also be received after the midday meal": this explains the time of reception. According to this treatise text, if there was no prior undertaking, receiving the precepts after the midday meal is invalid. Furthermore, according to this, the time before the midday meal is collectively termed "early morning." The Nyāyānusāra says: "Receiving this restraint must be for a day and night, namely until the following morning at sunrise." The Vibhāṣā, fascicle 124, says: "One day and one night, neither more nor less: namely, received from a teacher in the clear dawn, the restraint is relinquished at the next clear dawn. Up to: because the time period is fixed, and the alternation of light and dark is easy to discern."