*Buddhapashcimavavadopadesha 1.28

1.28

經曰：汝等比丘！晝則勤心修集善法無令失時，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，安可睡眠不自驚悟？煩惱毒蛇睡在汝心，譬如黑蚖在汝室睡，當以持戒之鉤早摒除之。睡蛇既出乃可安眠，不出而睡是無慚人。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！常當慚恥勿得暫替。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。

The Sūtra says: "You bhikṣus, during the day with diligent mind cultivate and gather wholesome dharmas, not letting time be lost. In the early night and late night, do not slacken either. In the middle of the night, recite the sūtras to pace yourselves; do not, through the condition of sleep, let an entire life pass in vain with nothing attained. You should remember that the fire of impermanence burns all worlds; quickly seek self-deliverance and do not sleep. The bandits of defilement constantly spy to kill people worse than a vengeful foe; how can you sleep and not awaken yourself in shock? The venomous snake of defilement sleeps within your heart, just as a black viper sleeps in your room; you should quickly expel it with the hook of holding the precepts. Only when the sleeping snake has departed may you sleep peacefully; to sleep when it has not departed is to be a person without shame. The garment of shame is foremost among all adornments. Shame is like an iron hook, able to restrain a person from unrighteousness. Therefore, bhikṣus, you should always feel shame and conscience, never neglecting them for an instant. If you abandon shame and conscience, you will lose all merits. One who has conscience possesses wholesome dharmas; if one lacks conscience, one is no different from the beasts."