Thirukkural

பல்லவை கற்றும் பயமிலரே நல்லவையுள் நன்கு செலச்சொல்லா தார்.

Pallavai Katrum Payamilare Nallavaiyul Nanku Selachchollaa Thaar

Those who cannot agreeably speak good things before a good assembly are indeed unprofitable persons inspite of all their various acquirements