Pugazhndhu uraiyaar punmaiyinaar inmai idhu
Sollil nagaippundu.
Those who speak ill of the virtuous — their baseness itself is laughable.
புகழ்ந்தோரை இகழ்வோர் இழிவினர்; இது சொல்லவே நகைப்பாகும்.
Those who speak ill of genuinely praiseworthy people reveal only their own baseness. The irony: backbiters think they diminish their targets but actually diminish only themselves. The contrast is laughable — their own petty self-exposure.