Kural - 529

Who once were his, and then forsook him, as before
Will come around, when cause of disagreement is no more

Explanation
Those who have been friends and have afterwards forsaken him, will return and join themselves (to him), when the cause of disagreement is not to be found in him.

Tamil Transliteration
Thamaraakik Thatrurandhaar Sutram Amaraamaik
Kaaranam Indri Varum.