Gurudāsa: Not enough sleep.
Prabhupāda: Enough sleep. That means you require twenty-four hours sleep. Out of that, if you sleep for ten hours, that is not sufficient. Your business is to sleep only. So ten hours' or eight hours' sleep is not sufficient. Kumbhakarṇa. Kumbhakarṇa. Just like he was sleeping six months.
Tamāla Kṛṣṇa: Hibernation.
Prabhupāda: (chuckling) Six months. We are also sleeping six months in a year because we sleep, generally, ten to twelve hours. So if you half day, means half year. We are also all Kumbhakarṇas. Anyone who sleeps more than six or seven hours, he is a Kumbhakarṇa. Kumbhakarṇa was the brother of Rāvaṇa. He was sleeping six months, and six months he was awake. That means anyone who sleeps half the, out of twenty-four hours, anyone, if he sleeps twelve hours, he's a Kumbhakarṇa. So at least I think that one should not sleep more than seven hours utmost. That is sufficient, sufficient, seven hours. So you can sleep six hours at night and one hour to rest in daytime. That is sufficient. But if you sleep more than that, then you are Kumbhakarṇa. You should adjust things. Nidrāhāra-vihārakādi-vijitau. That's the Gosvāmins.