Ashtangasamgraha 28.60

28.60

snehabastiṃ nirūhaṃ vā naikamevātiśīlayet |

utkleśāgnivadhau snehānnirūhānmaruto bhayam ||

sarvajatrūrdhvarogaghnaṃ palitaghnaṃ viśeṣataḥ |

ebhireva ca bhaiṣajyaiḥ śiro vaktraṃ ca lepayet ||

One should not repeatedly practice solely an unctuous enema or an evacuating enema alone;
from unctuous enema comes nausea and loss of digestive fire, and from evacuating enema comes fear of vāta.
It destroys all diseases above the clavicle, especially graying of hair;
and with these very medicaments, one should smear the head and face.