yaagaavaar aayinum naakaakkha kaavaakkhal
sogaappar sollizhukku pattu

--
thiruvalluvar
( thirukkural : 127
adhigaram : 13, adakkamudaimai
illaravial
araththuppal)


translates roughly to :
whatever thy might fail to guard, guard well thy tongue,
for flawed words constantly invokes anguish and affliction.
--
taken from "thirukkural" written by "thiruvalluvar" in 31 BC
chapter : 13, self-control
section : domestic life
part : virtue