Samyuktagama (Sanskrit fragments) 271.6

271.6

佛告比丘：「是低舍比丘是愚癡人，不守根門，飲食不知量，初夜、後夜，心不覺悟，懈怠嬾惰，不勤精進，不善觀察思惟善法；彼於分別法，心樂修梵行，離諸睡眠，於正法中離諸疑惑，無有是處。若當比丘守護根門，飲食知量，初夜、後夜，覺悟精進，觀察善法，樂分別法，樂修梵行，離於睡眠，心不疑法，斯有是處。」

The Buddha told the monk, “This monk Tiṣya is a foolish man. He doesn’t guard the doors of his faculties, doesn’t know how much food is enough, and he isn’t awake in the first and last watch of the night. He’s indolent and lazy, doesn’t make diligent effort, and doesn’t skillfully investigate and consider the good Dharma. It’s not possible for him to discern the Dharma, feel happy cultivating the religious life, be free of sleepiness, or be free of doubts about the correct Dharma. If he’s going to be a monk, he should guard the doors of his faculties, know what’s enough food, stay awake and apply himself during the first and last watch of the night, and observe the good Dharma. Then it’ll be possible for him to delight in discerning the Dharma, enjoy cultivating the religious life, be free of sleepiness, and not have doubts about the Dharma.”