Saṃyutta Nikāya
5. Mahā-Vagga
51. Iddhi-Pāda Saṃyutta
3. Ayo-Guḷa Vagga
Sutta 24
Suddhaka Suttaṃ
Pure and Simple[1]
Translated from the Pāḷi
by
Michael M. Olds
"Four, beggars, are power-paths.
What four?
Here, beggars, a beggar develops the power-path
that is wish-serenity-connected-exertion-own-making,
he develops the power-path
that is energy-serenity-connected-exertion-own-making,
he develops the power-path
that is heart-serenity-connected-exertion-own-making,
he develops the power-path
that is investigation-serenity-connected-exertion-own-making.
These, then, beggars, are the four power-paths."
[1] Woodward translates 'Puritan' and states the text is in error. Bhk. Bodhi has the right idea: Simple Version. By itself.