The Compendium of Caraka 3.3.36_1

3.3.36_1

nidarśanamapi cātrodāhariṣyāmaḥ---yadi hi niyatakālapramāṇamāyuḥ sarvaṃ syāt, tadā++āyuṣkāmāṇāṃ namantrauṣadhimaṇimaṅgalabalyupahārahomaniyamaprāyaścittopavāsasvastyayanapraṇipātagamanādyāḥ kriyā iṣṭayaśca prayojyeran; nodbhrāntacaṇḍacapalagogajoṣṭrakharaturagamahiṣādayaḥ pavanādayaśca duṣṭāḥ parihāryāḥ syuḥ, na prapātagiriviṣamadurgāmbuvegāḥ, tathā na pramattonmattodbhrāntacaṇḍacapalamohalobhākulamatayaḥ, nārayaḥ, na pravṛddho 'agniḥ, ca vividhaviṣāśrayāḥ sarīsṛporagādayaḥ, na sāhasaṃ, nādeśakālacaryā, na narendraprakopa iti; evamādayo hi bhāvā nābhāvakarāḥ syuḥ, āyuṣaḥ sarvasya niyatakālapramāṇatvāt/

And on this point we shall also cite an illustration: For if all lifespan were of a predetermined duration, then rites and sacrifices such as mantras, medicines, gems, auspicious rites, offerings, oblations, burnt offerings, observances, expiations, fasts, benedictions, prostrations, and pilgrimages would not be employed by those desiring longevity; nor would crazed, fierce, and restless cows, elephants, camels, donkeys, horses, buffaloes, and the like, as well as vitiated winds and the like, have to be avoided; nor precipices, rugged mountains, impassable terrains, and rapids of water; likewise, not persons whose minds are heedless, intoxicated, crazed, fierce, fickle, or confounded by delusion and greed, nor enemies, nor raging fire, nor creeping reptiles, snakes, and the like that harbour various poisons, nor rash overexertion, nor conduct improper for place and time, nor the wrath of kings; for factors such as these would not be destructive, because all lifespan would be of a predetermined duration.