Paccupannasutta

Suttapiṭaka · Saṁyuttanikāya · Saḷāyatanavaggasaṁyutta · Vol. 18 · Section 265

[265] "Bhikkhus, the eye of the present is impermanent (anicca) … The tongue of the present is impermanent … The mind (mano) of the present is impermanent. Seeing thus … he understands: '… there is no further coming to this state of being.'"

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 3 other places

Vol. 18 · Section 279 — Anattasutta
Vol. 18 · Section 281 — Ajjhattāyatanasutta
Vol. 18 · Section 275 — Dukkhasutta