Kural - 934

Gaming brings many woes, and ruins fair renown;
Nothing to want brings men so surely down

Explanation
There is nothing else that brings (us) poverty like gambling which causes many a misery and destroys (one's) reputation.

Tamil Transliteration
Sirumai Palaseydhu Seerazhikkum Soodhin
Varumai Tharuvadhondru Il.