Asaṅkhatasaṅyutta

Suttapiṭaka · Saṁyuttanikāya · Saḷāyatanavaggasaṁyutta · Vol. 18 · Section 678

[678] And what, bhikkhus, is the path leading to the unconditioned (asaṅkhata)? The four establishments of mindfulness (satipaṭṭhāna). 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English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.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