Srimad Bhagavatam Canto 10, Chapter 15, Text 15

SB 10.15.15

nrtyato gayatah kvapi
 valgato yudhyato mithah
grhita-hastau gopalan
 hasantau prasasamsatuh
 
Translation: 
 
Sometimes, as the cowherd boys danced, sang, moved about and playfully fought with each other, Krsna and Balarama, standing nearby hand in hand, would glorify Their friends’ activities and laugh.
Srimad Bhagavatam Canto 10, Chapter 15, Text 14
Srimad Bhagavatam Canto 10, Chapter 15, Text 16