Kural - 681

Benevolence high birth, the courtesy kings love:-
These qualities the envoy of a king approve

Explanation
The qualification of an ambassador are affection (for his relations) a fitting birth, and the possession of attributes pleasing to royalty.

Tamil Transliteration
Anputaimai Aandra Kutippiraththal Vendhavaam
Panputaimai Thoodhuraippaan Panpu.