Srimad Bhagavatam Canto 12, Chapter 07, Text 17

SB 12.7.17

naimittikah prakrtiko
 nitya atyantiko layah
samstheti kavibhih proktas
 caturdhasya svabhavatah
 
Translation: 
 
There are four types of cosmic annihilation — occasional, elemental, continuous and ultimate — all of which are effected by the inherent potency of the Supreme Lord. Learned scholars have designated this topic dissolution.
Srimad Bhagavatam Canto 12, Chapter 07, Text 16
Srimad Bhagavatam Canto 12, Chapter 07, Text 18