Prabhupāda: That is not much. Sixteen... It takes only two hours, sixteen rounds. Huh? Two hours, or more than that?
Mālatī: Two hours is all it takes to do the rounds.
Prabhupāda: So you have to spend two hours for Kṛṣṇa out of twenty-four. (walks for awhile and chants japa) Yes?
Devotee (1): Is there something wrong with sleeping eight hours?
Prabhupāda: Sleeping and eating, this is the material disease. Sleeping, eating, mating... So they should be reduced as much as possible.
Devotee (1): If you're still tired...
Prabhupāda: No, you can sleep till you are refreshed. Somebody's refreshed by sleeping four hours. Somebody is refreshed by sleeping ten hours.
Mālatī: But we should not sleep when we have, in place of our devotional service.
Prabhupāda: No, of course not. Devotional service is first.