Srimad Bhagavatam Canto 12, Chapter 03, Text 29

SB 12.3.29

yada lobhas tv asantoso
 mano dambho ’tha matsarah
karmanam capi kamyanam
 dvaparam tad rajas-tamah
 
Translation: 
 
When greed, dissatisfaction, false pride, hypocrisy and envy become prominent, along with attraction for selfish activities, such a time is the age of Dvapara, dominated by the mixed modes of passion and ignorance.
Srimad Bhagavatam Canto 12, Chapter 03, Text 28
Srimad Bhagavatam Canto 12, Chapter 03, Text 30