Kural - 889

Though slight as shred of 'seasame' seed it be,
Destruction lurks in hidden enmity

Explanation
Although internal hatred be as small as the fragment of the sesamum (seed), still does destruction dwell in it.

Tamil Transliteration
Etpaka Vanna Sirumaiththe Aayinum
Utpakai Ulladhaang Ketu.