Kural - 180

From thoughtless lust of other's goods springs fatal ill,
Greatness of soul that covets not shall triumph still

Explanation
To covet (the wealth of another) regardless of consequences will bring destruction That greatness (of mind) which covets not will give victory.

Tamil Transliteration
Iraleenum Ennaadhu Veqkin Viraleenum
Ventaamai Ennunj Cherukku.