Thirukkural

நாநலம் என்னும் நலனுடைமை அந்நலம் யாநலத்து உள்ளதூஉம் அன்று.

Naanalam Ennum Nalanutaimai Annalam Yaanalaththu Ulladhooum Andru

The possession of that goodness which is called the goodness of speech is (even to others) better than any other goodness