Kural - 259

Than thousand rich oblations, with libations rare,
Better the flesh of slaughtered beings not to share

Explanation
Not to kill and eat (the flesh of) an animal, is better than the pouring forth of ghee etc, in a thousand sacrifices.

Tamil Transliteration
Avisorin Thaayiram Vettalin Ondran
Uyirsekuth Thunnaamai Nandru.