Saññāsutta

Suttapiṭaka · Saṁyuttanikāya · Khandhavaggasaṁyutta · Vol. 17 · Section 264

[264] Bhikkhus, just as a reed-cutter, having cut the reeds (pabbaja), grasps them by the top and shakes them down, shakes them about, and thrashes them out; even so, bhikkhus, the perception of impermanence (aniccasaññā), when developed … .

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.