Kural - 197

Let those who list speak things that no delight afford,
'Tis good for men of worth to speak no idle word

Explanation
Let the wise if they will, speak things without excellence; it will be well for them not to speak useless things.

Tamil Transliteration
Nayanila Sollinunj Cholluka Saandror
Payanila Sollaamai Nandru.