Srimad Bhagavatam Canto 10, Chapter 74, Text 50

SB 10.74.50

varnitam tad upakhyanam
 maya te bahu-vistaram
vaikuntha-vasinor janma
 vipra-sapat punah punah
 
Translation: 
 
I have already described to you in detail the history of the two residents of Vaikuntha who had to undergo repeated births in the material world because of being cursed by brahmanas.
Srimad Bhagavatam Canto 10, Chapter 74, Text 49
Srimad Bhagavatam Canto 10, Chapter 74, Text 51