[417] Then, Aggivessana, this occurred to me: 'Suppose I were, with teeth clenched against teeth and with the tongue pressed against the palate, to restrain, crush, and torment mind (citta) with mind.' So, Aggivessana, with teeth clenched against teeth and with the tongue pressed against the palate, I restrained, crushed, and tormented mind with mind. And, Aggivessana, as I was thus restraining, crushing, and tormenting mind with mind, with teeth clenched against teeth and with the tongue pressed against the palate, sweat streamed from my armpits. Just as, Aggivessana, a strong man, having seized a weaker man by the head or by the shoulders, might restrain him, crush him, and torment him, even so, Aggivessana, as I was restraining, crushing, and tormenting mind with mind, with teeth clenched against teeth and with the tongue pressed against the palate, sweat streamed from my armpits. And though, Aggivessana, my energy (vīriya) was aroused and unflagging, and my mindfulness (sati) was established and unconfused, yet my body was overwrought and not tranquil, because I was overcome by that very painful striving. But, Aggivessana, even such painful feeling (vedanā) as had arisen did not take hold of my mind and remain.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.