大方廣佛華嚴經隨疏演義鈔 59.18

59.18

疏「晝則存心」等者，即《遺教經》。經云「汝等比丘！晝則勤心修習善法，無令失時。初夜後夜亦勿有廢。中夜誦經以自消息，無以睡眠因緣令一生空過無所得也。當念無常之火燒諸世間，早求自度勿睡眠也。諸煩惱賊常伺殺人甚於怨家，安可睡眠不自警悟？煩惱毒蛇睡在汝心，譬如黑蚖在汝室睡，當以持戒之鉤早併除之，睡蛇既出乃可安眠；不出而眠是無慚人也。慚恥之服，於諸莊嚴最為第一。慚如鐵鉤，能制人非法。是故比丘！常當慚愧，無得暫替。若離慚恥，則失諸功德。有愧之人則有善法，若無愧者與諸禽獸無相異也。」釋曰：但觀所引，疏文易了。

Regarding the commentary's statement, "During the day, hold one's mind," and so on: this is from the Bequeathed Teaching Sūtra. The sūtra states: 'O you bhikṣus! During the day, diligently cultivate wholesome dharmas with your mind, not allowing time to be lost. Do not neglect this in the early night or late night either. In the middle of the night, recite the sūtras to refresh yourselves; do not, on account of sleep, let an entire life pass in vain without gaining anything. You should reflect that the fire of impermanence burns the worlds; seek your own deliverance early, and do not sleep. The thieves of the afflictions constantly watch for an opportunity to kill people, worse than mortal enemies; how can you sleep without alerting yourselves? The poisonous serpent of afflictions sleeps in your mind, just like a black viper sleeping in your room; you should use the hook of upholding the precepts to eliminate it early on. Only when the sleeping serpent has been cast out may you sleep in peace; to sleep when it has not been cast out is to be shameless. The clothing of shame is the foremost among all adornments. Shame is like an iron hook that can restrain people from unrighteousness. Therefore, bhikṣus, you should always feel shame and guilt, never letting it lapse for a moment. If you abandon shame, you will lose all merits. One who has guilt possesses wholesome dharmas; if one is without guilt, one is no different from beasts.' Explication: Simply by examining what has been cited, the commentary's text is easily understood.