Ashtangasamgraha 28.63

28.63

sahasrāyuḥ śrutadharo vītapāpmāmaraprabhaḥ |

vājisyado nāgabalaḥ sthirabuddhīndriyānalaḥ ||

tenāliptaṃ śiraḥ śuddhamasnigdhamuṣitaṃ niśām |

tatprātastriphalaudhātaṃ syātkṛṣṇasnigdhamūrddhajam ||

Attaining a lifespan of a thousand years, retaining what he hears, freed from sins, radiant like an immortal,
with the speed of a horse, the strength of an elephant, and with steadfast intellect, senses, and digestive fire.
When the cleansed, unctuous-free head is smeared with it and left for the night,
and then washed in the morning with Triphalā, the hair becomes black and glossy.