Ashtangasamgraha 24.3

24.3

bṛṃhaṇaṃ yat bṛhatvāya laṅghanaṃ lāghavāya yat |

dehasyaṃ bhavataḥ prāyo bhaumāpamitaracca te ||

sirāvyadhoktāśca mūrchādayaḥ |

naiva ca srāvayedaṅgaglānau rūkṣe vātottaraṃ ca raktam |

tataśca punaḥ snehayuktāni rūkṣāṇi vā virecanāni bastikarma cāsakṛt prayojayet ||

That which leads to stoutness of the body is bṛṃhaṇa; that which leads to lightness is laṅghana; / the former mostly consists of earth and water, while the other [consists of the remaining elements].
And fainting and the like, as stated under venesection [may occur].
Nor should one let blood in case of body exhaustion, dryness, or when vāta is predominant.
And then one should repeatedly administer unctuous or dry purgatives and the procedure of enema.