The Compendium of Caraka 8.1.29

8.1.29

dehe nirūheṇa viśuddhamārge saṃsnehanaṃ varṇabalapradaṃ ca/
na tailadānāt paramasti kiñciddravyaṃ viśeṣeṇa &samīraṇārte//

In a body whose passages have been cleansed by an un-oily enema, it causes unction and bestows complexion and strength. / There is no substance superior to the administration of oil, especially for one afflicted with vāta.