References – SN 45.55: Accomplishment in Virtue, Etc. 
Sutta / Saṁyutta Nikāya / SN 45: Maggasaṁyutta / SN 45.55: Yonisomanasikārasampadāsutta

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Simile: As dawn precedes sunrise, when one recognizes the quality of appamāda (heedfulness), one can expect the unfolding of the Eightfold Path. (SN 45.55) — Ajahn Pasanno. [Similes] [Heedfulness] [Eightfold Path] [Recollection/Death] [Dispassion] // [Liberation]

Ānāpānasati: Mindfulness of In-and-Out Breathing [2005], Session 16, Excerpt 1