Kural - 842

The gift of foolish man, with willing heart bestowed, is nought,
But blessing by receiver's penance bought

Explanation
(The cause of) a fool cheerfully giving (something) is nothing else but the receiver's merit (in a former birth).

Tamil Transliteration
Arivilaan Nenjuvandhu Eedhal Piridhiyaadhum
Illai Peruvaan Thavam.