Astanga Hrudaya
दोषा एव हि सर्वेषां रोगाणामेककारणम्। यथा पक्षी परिपतन् सर्वतः सर्वमप्यहः॥३२॥
Like a bird flying high in the sky cannot escape from its shadow, the root cause for disease lies in Tridosha.
english translation
doSA eva hi sarveSAM rogANAmekakAraNam। yathA pakSI paripatan sarvataH sarvamapyahaH॥32॥
hk transliteration by Sanscript