Srimad Bhagavatam Canto 10, Chapter 32, Text 18

SB 10.32.18

bhajanty abhajato ye vai
 karunah pitarau yatha
dharmo nirapavado ’tra
 sauhrdam ca su-madhyamah
 
Translation: 
 
My dear slender-waisted gopis, some people are genuinely merciful or, like parents, naturally affectionate. Such persons, who devotedly serve even those who fail to reciprocate with them, are following the true, faultless path of religion, and they are true well-wishers.
Srimad Bhagavatam Canto 10, Chapter 32, Text 17
Srimad Bhagavatam Canto 10, Chapter 32, Text 19