Ashtangasamgraha 34.38

34.38

yuktakārī bhiṣag bubhūṣuḥ puruṣaṃ saṃpūrṇagātramaviṣahatamadīrghavyādhipīḍitaṃ niṣkṛṣṭadṛṣṭāntramāvahantyāmāpagāyāṃ muñjabalbajaveṣṭitaṃ pañjarasthamaprakāśe deśe kothayet |

taṃ samyakprakuthitaṃ codghṛtyāyatadehaṃ kṛtvośīraveṇukūrcādīnāmanyatamena śanaiśśanairavaghṛṣya tvagādīn sarvāneva bāhyābhyantarānaṅgasirāsnāyvādīnavayavānācāryopadarśitenāgamena cakṣuṣā ca lakṣayet ||

A physician wishing to become skilled in practice should take an intact human corpse, not killed by poison, not suffering from a chronic disease, whose entrails have been extracted and inspected, wrap it in muñja grass and balbaja grass, place it inside a cage, and let it decompose in an unexposed place in a flowing river; / then, having removed it when thoroughly decomposed, having stretched out the body, he should gently scrape away [the layers] with any of [a brush made of] vetiver, bamboo whiskers, or the like, and examine with his own eyes, following the tradition taught by his preceptor, all the external and internal parts, beginning with the skin, limbs, vessels, and tendons.