Pāli · Sutta Piṭaka (Pāli, Mahāsaṅgīti)
4. Adantavagga 31
“Nāhaṁ, bhikkhave, aññaṁ ekadhammampi samanupassāmi yaṁ evaṁ adantaṁ mahato anatthāya saṁvattati yathayidaṁ, bhikkhave, cittaṁ. Cittaṁ, bhikkhave, adantaṁ mahato anatthāya saṁvattatī”ti.
English · Bhikkhu Sujato
The Chapter on the Untamed 31
“Mendicants, I do not see a single thing that is so very harmful as this mind that is not tamed. An untamed mind is very harmful.”