Kural - 322

Let those that need partake your meal; guard every-thing that lives;
This the chief and sum of lore that hoarded wisdom gives

Explanation
The chief of all (the virtues) which authors have summed up, is the partaking of food that has been shared with others, and the preservation of the mainfold life of other creatures.

Tamil Transliteration
Pakuththuntu Palluyir Ompudhal Noolor
Thokuththavatrul Ellaan Thalai.