Kural - 688

Integrity, resources, soul determined, truthfulness
Who rightly speaks his message must these marks possess

Explanation
The qualifications of him who faithfully delivers his (sovereign's) message are purity, the support (of foreign ministers), and boldness, with truthfulness in addition to the (aforesaid) three.

Tamil Transliteration
Thooimai Thunaimai Thunivutaimai Immoondrin
Vaaimai Vazhiyuraippaan Panpu.