Kural - 1060

Askers refused from wrath must stand aloof;
The plague of poverty itself is ample proof

Explanation
He who begs ought not to be angry (at a refusal); for even the misery of (his own) poverty should be a sufficient reason (for so doing).

Tamil Transliteration
Irappaan Vekulaamai Ventum Nirappitumpai
Thaaneyum Saalum Kari.