[28] Now at that time sick bhikkhus had need of roots as medicines (bhesajja). They reported this matter to the Blessed One. "Bhikkhus, I allow root medicines: turmeric (haliddā), ginger (siṅgivera), sweet flag (vaca), white sweet flag (vacattha), ativisa, kaṭukarohiṇī, vetiver root (usīra), nut-grass (bhaddamuttaka), or whatever other root medicines there may be that serve no purpose as solid food among solid foods, nor serve any purpose as soft food among soft foods — having formally received (paṭiggahetvā) them, to keep them for as long as life lasts, and to consume them when there is a reason. For one who consumes them when there is no reason, there is an offence of wrongdoing (dukkaṭa)."
Now at that time sick bhikkhus had need of root medicines in ground form. They reported this matter to the Blessed One. "Bhikkhus, I allow a grinding stone and a grinding-stone roller."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.