The Tipiṭaka in Three Languages

Asaṅkhatasaṅyuttavagga

Suttapiṭaka · Saṁyuttanikāya · Saḷāyatanavaggasaṁyutta · Vol. 18 · Section 704

[704] And what, bhikkhus, is the path leading to the unconditioned (asaṅkhata)? Here, bhikkhus, a bhikkhu develops the basis for spiritual power (iddhipāda) endowed with concentration (samādhi) due to investigation (vīmaṃsā) and with volitional formations of striving (padhānasaṅkhāra). This, bhikkhus, is called the path leading to the unconditioned.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 5 other places