Ashtangasamgraha 6.32

6.32

Water, even when administered to a thirsty person, in excessive quantity / turns into śleṣman and pitta, especially in a feverish person.
It is balanced, irregular, sharp, and dull.
Among these, the balanced one properly digests food that has been properly consumed.
The irregular one digests even [food] that has been improperly consumed, and does not digest even [food] that has been properly consumed.
The sharp one rapidly digests even [food] that has been improperly consumed;
that very one, increasing [further], becomes 'excessive fire' (atyagni).
The dull one, even with [food] properly consumed, digests it only after a long time, exhibiting symptoms of uncooked matter (āma) such as heaviness of the abdomen, flatulence, constipation, gurgling, rumbling in the bowels, dryness of the mouth, and obstruction of flatus.
Even by external fire consisting of flames and charcoal, digestion [or cooking] is not always of a single uniform kind;
how much less so by that which resides within, consists of heat, even if balanced!
Therefore, one should protect it with diligent effort.
There, having brought them to suitability gradually—the balanced one with the best suitable regimen, and the others each according to its own nature with the others—one should maintain it with the best [regimen], and with the management of vāta and the rest described in the chapter on the treatment of the doṣas, and with the medicinal and exercise regimens prescribed for the disease of the duodenum (grahaṇī).
And on this point there are [verses]:
And he awakens from the darkness only after a long time, having nausea and salivation.
Flowers of siris, kunda, and plantain, together with pippalī.
Through excess of purgation, it has identical features and management.
In possession by pitṛs, the aforementioned poultice made with vacā, vayasthā, jīvantī, dhātakī, priyaṅgu, guggulu, rāsnā, and realgar; / or an oil prepared with vacā and the others as an unction.