Kural - 264

Destruction to his foes, to friends increase of joy
The 'penitent' can cause, if this his thoughts employ

Explanation
If (the ascetic) desire the destruction of his enemies, or the aggrandizement of his friends, it will be effected by (the power of) his austerities.

Tamil Transliteration
Onnaarth Theralum Uvandhaarai Aakkalum
Ennin Thavaththaan Varum.