Kural - 805

Not folly merely, but familiar carelessness,
Esteem it, when your friends cause you distress

Explanation
If friends should perform what is painful, understand that it is owing not only to ignorance, but also to the strong claims of intimacy.

Tamil Transliteration
Pedhaimai Ondro Perungizhamai Endrunarka
Nodhakka Nattaar Seyin.