Thirukkural

அற்றம் மறைத்தலோ புல்லறிவு தம்வயின் குற்றம் மறையா வழி.

Atram Maraiththalo Pullarivu Thamvayin Kutram Maraiyaa Vazhi

Even to cover one's nakedness would be folly, if (one's) faults were not covered (by forsaking them)