Charak Samhita
मध्यमा मध्यमस्येष्टा कारणं शृणु चापरम्। दैवं पुरुषकारेण दुर्बलं ह्युपहन्यते ॥३३॥
Now listen to the other cause of the pre-determination, or of the life-span. A weak daiva gets subdued by a strong purushakara.
english translation
madhyamA madhyamasyeSTA kAraNaM zRNu cAparam। daivaM puruSakAreNa durbalaM hyupahanyate ॥33॥
hk transliteration by Sanscript