Kural - 759

Make money! Foeman's insolence o'ergrown
To lop away no keener steel is known

Explanation
Accumulate wealth; it will destroy the arrogance of (your) foes; there is no weapon sharper than it.

Tamil Transliteration
Seyka Porulaich Cherunar Serukkarukkum
Eqkadhanir Kooriya Thil.