Kural - 499

Though fort be none, and store of wealth they lack,
'Tis hard a people's homesteads to attack

Explanation
It is a hazardous thing to attack men in their own country, although they may neither have power nor a good fortress.

Tamil Transliteration
Sirainalanum Seerum Ilareninum Maandhar
Urainilaththotu Ottal Aridhu.