Kural - 649

Who have not skill ten faultless words to utter plain,
Their tongues will itch with thousand words man's ears to pain

Explanation
They will desire to utter many words, who do not know how to speak a few faultless ones.

Tamil Transliteration
Palasollak Kaamuruvar Mandramaa Satra
Silasollal Thetraa Thavar.