Srimad Bhagavatam Canto 10, Chapter 15, Text 40

SB 10.15.40

atha tala-phalany adan
 manusya gata-sadhvasah
trnam ca pasavas cerur
 hata-dhenuka-kanane
 
Translation: 
 
People now felt free to return to the forest where Dhenuka had been killed, and without fear they ate the fruits of the palm trees. Also, the cows could now graze freely upon the grass there.
 
Purport: 
 
According to the acaryas, low-class people such as the pulindas ate the fruits of the palm trees, but Krsna’s cowherd boyfriends considered them undesirable, since they had been tainted with the blood of the asses.
Srimad Bhagavatam Canto 10, Chapter 15, Text 39
Srimad Bhagavatam Canto 10, Chapter 15, Text 41