Kural - 569

Who builds no fort whence he may foe defy,
In time of war shall fear and swiftly die

Explanation
The king who has not provided himself with a place of defence, will in times of war be seized with fear and quickly perish.

Tamil Transliteration
Seruvandha Pozhdhir Siraiseyyaa Vendhan
Veruvandhu Veydhu Ketum.