Tuvaṭakasuttaniddesa

Suttapiṭaka · Khuddakanikāya · Mahāniddesa · Vol. 29 · Section 750

[750] "One should not indulge in sleep" means: having divided the night and day into six parts, one should keep awake for five parts and sleep for one part; hence, "one should not indulge in sleep."

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.