The Compendium of Caraka 1.14.43

1.14.43

svedanadravyāṇāṃ punarmūlaphalapatraśuṅgādīnāṃ mṛgaśakunapiśitaśiraspadādīnāmuṣṇasvabhāvānāṃ vā yathārhamamlalavaṇasnehopasaṃhitānāṃ mūtrakṣīrādīnāṃ vā kumbhyāṃ bāṣpamanudvamantyāmutkvathitānāṃ nāḍyā śareṣīkāvaṃśadalakarañjārkapatrānyatamakṛtayā gajāgrahastasaṃsthānanā vyāmadīrghayā vyāmārdhadīrghayā vā vyāmacaturbhāgāṣṭabhāgamūlāgrapariṇṇāhasrotasā sarvato vātaharapatrasaṃvṛtacchidrayā dvistrirvā vināmitayā vātaharasiddhasnehābhyaktagātro bāṣpamupaharet; bāṣpo hyanṛjugāmī& vihatacaṇḍavegastvacamavidahan sukhaṃ svedayatīti nāḍīsvedaḥ//

Moreover, of the sudation substances—roots, fruits, leaves, sprouts, and the like, or flesh, heads, feet, and the like of wild animals or birds of hot nature, combined as appropriate with sour liquids, salt, and unctuous substances, or urine, milk, and the like—boiled in a pot that does not let the steam escape, one whose body is anointed with unctuous substances prepared with vāta-alleviating drugs should direct the steam through a pipe made of either reeds, hollow bamboo, karañja, or arka leaves, shaped like an elephant's trunk, a fathom long or half a fathom long, with a channel having a circumference of one-fourth of a fathom at the base and one-eighth at the tip, its apertures wrapped all around with vāta-alleviating leaves, bent two or three times; for steam that travels non-linearly, its fierce speed broken, produces sweat comfortably without burning the skin: this is nāḍīsveda.