Aniccānupassīsutta
“Sattime, bhikkhave, puggalā āhuneyyā pāhuneyyā dakkhiṇeyyā añjalikaraṇīyā anuttaraṁ puññakkhettaṁ lokassa. Katame satta? Idha, bhikkhave, ekacco puggalo sabbasaṅkhāresu aniccānupassī viharati, aniccasaññī, aniccapaṭisaṁvedī satataṁ samitaṁ abbokiṇṇaṁ cetasā adhimuccamāno paññāya pariyogāhamāno. So āsavānaṁ khayā …pe… sacchikatvā upasampajja viharati. Ayaṁ, bhikkhave, paṭhamo puggalo āhuneyyo pāhuneyyo dakkhiṇeyyo añjalikaraṇīyo anuttaraṁ puññakkhettaṁ lokassa.
Observing Impermanence
“Mendicants, these seven individuals are worthy of offerings dedicated to the gods, worthy of hospitality, worthy of a religious donation, worthy of greeting with cupped palms, and are the supreme field of merit for the world. What seven? First, take an individual who meditates observing impermanence in all conditions. They perceive impermanence and experience impermanence. Constantly, continually, and without interruption, they apply the mind and fathom with wisdom. They’ve realized the undefiled freedom of heart and freedom by wisdom, and live having realized it with their own insight in this very life due to the ending of defilements. This is the first individual.