Kural - 984

The type of 'penitence' is virtuous good that nothing slays;
To speak no ill of other men is perfect virtue's praise

Explanation
Penance consists in the goodness that kills not , and perfection in the goodness that tells not others' faults.

Tamil Transliteration
Kollaa Nalaththadhu Nonmai Pirardheemai
Sollaa Nalaththadhu Saalpu.