Kural - 700

Who think 'We're ancient friends' and do unseemly things;
To these familiarity sure ruin brings

Explanation
The (foolish) claim with which a minister does unbecoming acts because of his (long) familiarity (with the king) will ensure his ruin.

Tamil Transliteration
Pazhaiyam Enakkarudhip Panpalla Seyyum
Kezhudhakaimai Ketu Tharum.