Kural - 944

Knowing the food digested well, when hunger prompteth thee,
With constant care, the viands choose that well agree

Explanation
(First) assure yourself that your food has been digested and never fail to eat, when very hungry, whatever is not disagreeable (to you).

Tamil Transliteration
Atradhu Arindhu Kataippitiththu Maaralla
Thuykka Thuvarap Pasiththu.