Ashtangasamgraha 17.4

17.4

tatra dravyaṃ gurukaṭhinaviśadamandasāndrasthūlasthiragandhaguṇabahulaṃ pārthivaṃ upacayagauravasaṅghātasthairyakaram ||

tataścod vṛtya parisrāvya harītakīkvāthāmladadhipratīvāpaṃ vipācayet ||

nājīrṇabhīruvamitaśiraḥkarṇākṣiśūlinām |

nātyuṣṇaśītavātābhre nāsampūrṇāṃ ca nīlikām ||

There, an earthy substance abounds in the qualities of heavy, hard, non-slimy, dull, dense, gross, stable, and smell; it produces nourishment, heaviness, cohesion, and firmness.
Then, having taken it out and strained it, one should cook it with an addition of harītakī decoction and sour curd.
Not for those suffering from indigestion, the timid, those who have vomited, those with pain in the head, ears, or eyes;
nor when it is excessively hot, cold, windy, or cloudy, nor when the nīlikā is incomplete.