Srimad Bhagavatam Canto 10, Chapter 15, Text 18

SB 10.15.18

anye tad-anurupani
 manojnani mahatmanah
gayanti sma maha-raja
 sneha-klinna-dhiyah sanaih
 
Translation: 
 
My dear King, other boys would sing enchanting songs appropriate to the occasion, and their hearts would melt out of love for the Lord.
Srimad Bhagavatam Canto 10, Chapter 15, Text 17
Srimad Bhagavatam Canto 10, Chapter 15, Text 19