Kural - 94

The men of pleasant speech that gladness breathe around,
Through indigence shall never sorrow's prey be found

Explanation
Sorrow-increasing poverty shall not come upon those who use towards all, pleasure-increasing sweetness of speech.

Tamil Transliteration
Thunpurooum Thuvvaamai Illaakum Yaarmaattum
Inpurooum Inso Lavarkku.