Kural - 172

Through lust of gain, no deeds that retribution bring,
Do they, who shrink with shame from every unjust thing

Explanation
Those who blush at the want of equity will not commit disgraceful acts through desire of the profit that may be gained.

Tamil Transliteration
Patupayan Veqkip Pazhippatuva Seyyaar
Natuvanmai Naanu Pavar.