In their former birth, these two sons, known as Nalakuvara and Manigriva, were extremely opulent and fortunate. But because of pride and false prestige, they did not care about anyone, and thus Narada Muni cursed them to become trees - SB 10.9.23

Expressions researched:
"In their former birth, these two sons, known as Nalakūvara and Maṇigrīva, were extremely opulent and fortunate. But because of pride and false prestige, they did not care about anyone, and thus Nārada Muni cursed them to become trees"

Srimad-Bhagavatam

SB Canto 10.1 to 10.13

In their former birth, these two sons, known as Nalakūvara and Maṇigrīva, were extremely opulent and fortunate. But because of pride and false prestige, they did not care about anyone, and thus Nārada Muni cursed them to become trees.

SB 10.9.23, Translation

In their former birth, these two sons, known as Nalakūvara and Maṇigrīva, were extremely opulent and fortunate. But because of pride and false prestige, they did not care about anyone, and thus Nārada Muni cursed them to become trees.