Kural - 563

Where subjects dread of cruel wrongs endure,
Ruin to unjust king is swift and sure

Explanation
The cruel-sceptred king, who acts so as to put his subjects in fear, will certainly and quickly come to ruin.

Tamil Transliteration
Veruvandha Seydhozhukum Vengola Naayin
Oruvandham Ollaik Ketum.