Ashtangasamgraha 3.61

3.61

śarīrāyāsajananaṃ karma vyāyāma ucyate |

lāghavaṃ karmasāmarthyaṃ dīpto 'gnirmedasaḥ kṣayaḥ ||

pītvā kaṣāyān payasā bhuñjīta payasaiva tu |

kaṣāyayogairebhirvā vipakvaṃ pāyayet ghṛtam ||

Action that produces physical exertion is called exercise. / Lightness, capacity for work, a kindled digestive fire, and loss of fat, / [Therapeutic text intercalated: Having drunk the decoctions with milk, one should eat only with milk; or one should administer ghee prepared with these decoction compounds;]