Kural - 90

The flower of 'Anicha' withers away, If you do but its fragrance inhale;
If the face of the host cold welcome convey, The guest's heart within him will fail

Explanation
As the Anicham flower fades in smelling, so fades the guest when the face is turned away.

Tamil Transliteration
Moppak Kuzhaiyum Anichcham Mukandhirindhu
Nokkak Kuzhaiyum Virundhu.