Ashtangasamgraha 5.23

5.23

There one should employ all [measures], and avoid one who suppresses urges, / one vomiting feces, the severely distressed, the emaciated, and one tormented by thirst and colic.
For, being the seat of the internal fire, holding back the food from the stomach as it turns toward the intestine by force, it dries and digests it through the heat of pitta, and releases what is digested, but when overcome by doṣas, it [releases] even the undigested because of weakness.
Hence, from its seizing (grahaṇa) of food, it is named grahaṇī.
And its power is pitta itself, termed digestive fire; therefore, sustained and nourished by the digestive fire, sharing a common welfare with it, it sustains the body.
Departing from this mostly into a state of waste product, it is not at all capable of nourishing the bodily tissues.
A boiled śāli-rice meal for one whose chest is wounded, whose semen, strength, and senses are diminished,
should be eaten with milk boiled with ātmaguptā, uccaṭā, and ikṣura.
Casting [oblations] circumambulating clockwise in order, one should recite the mantra there: