Kural - 578

Who can benignant smile, yet leave no work undone;
By them as very own may all the earth be won

Explanation
The world is theirs (kings) who are able to show kindness, without injury to their affairs, (administration of justice).

Tamil Transliteration
Karumam Sidhaiyaamal Kannota Vallaarkku
Urimai Utaiththiv Vulaku.