Kural - 215

The wealth of men who love the 'fitting way,' the truly wise,
Is as when water fills the lake that village needs supplies

Explanation
The wealth of that man of eminent knowledge who desires to exercise the benevolence approved of by the world, is like the full waters of a city-tank.

Tamil Transliteration
Ooruni Neernirain Thatre Ulakavaam
Perari Vaalan Thiru.