Attadaṇḍasuttaniddesa

Suttapiṭaka · Khuddakanikāya · Mahāniddesa · Vol. 29 · Section 821

[821] Sleep, lethargy, and dullness (thīna) one should overcome; one should not dwell with heedlessness (pamāda); one should not take a stand on excessive conceit (atimāna) — such is a person whose mind is set on Nibbāna.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.