Kural - 942

No need of medicine to heal your body's pain,
If, what you ate before digested well, you eat again

Explanation
No medicine is necessary for him who eats after assuring (himself) that what he has (already) eaten has been digested.

Tamil Transliteration
Marundhena Ventaavaam Yaakkaikku Arundhiyadhu
Atradhu Potri Unin.