[1229] "And what, Ānanda, is the development (bhāvanā) of the bases of spiritual power (iddhipāda)? Here, Ānanda, a bhikkhu develops the basis of spiritual power possessed of concentration (samādhi) due to desire (chanda) and volitional formations of striving (padhānasaṅkhāra). He develops the basis of spiritual power possessed of concentration due to energy (vīriya) … concentration due to mind (citta) … concentration due to investigation (vīmaṃsā) and volitional formations of striving. This, Ānanda, is called the development of the bases of spiritual power."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.