The Compendium of Caraka 6.1.4.2

6.1.4.2

It pacifies all diseases, is aphrodisiac, supreme for longevity,
bestows strength of mind, memory, body, digestive fire, intellect, and senses,
is supremely invigorating, produces complexion and voice,
allays poison and ill fortune, and bestows mastery over all speech.
Accomplishment of goals, fresh youth, affection of people, and renown in the world—
all this is attained by those who properly employ this holy rejuvenative of generous potency.
(Thus ends another rejuvenative declared by Indra.)
For those who are capable, free from disease, wise, self-controlled,
possessing leisure and attendants, entering an enclosure is wholesome.
For those who are otherwise, however, the procedure exposed to sun and wind is prescribed;
of the two, the former procedure is superior, but it is very difficult to perform.
If diseases should arise from a failure in the procedure of rejuvenatives,
one should discontinue the rejuvenative and administer medicine appropriate to them.
One who speaks the truth, is free from anger, abstains from liquor and sexual intercourse,
non-violent, free from overexertion, tranquil, speaking kindly,
devoted to japa and cleanliness, steadfast, constantly generous, ascetic,
devoted to worshipping the gods, cows, brahmins, teachers, elders, and the aged,
ever devoted to non-cruelty, ever compassionate,
equal in waking and sleep, constantly consuming milk and ghee,
knowing the measure of place and time, knowing proper application, free from egotism,
proper in conduct, not corrupt, with senses directed inward to the self,
reverent toward elders, believers, and self-controlled persons,
and devoted to textbooks of dharma: such a man one should know as a constant rejuvenative.
He who, endowed with all these qualities assembled together, employs a rejuvenative,
attains all the qualities of a rejuvenative as described.
(Thus ends the rejuvenative of conduct.)
Without expelling, at least in a general way, bodily and mental flaws,
a person is never joined with the qualities of a rejuvenative.
For regimens meant for the extension of lifespan and the eradication of old age and disease
succeed only for those whose minds and bodies are purified, and who are self-restrained.
All this should not be spoken to those ruined in soul,
to those free from ailment, to non-twice-born men, and to those in whom there is no desire to serve.