Srimad Bhagavatam Canto 10, Chapter 24, Text 22

SB 10.24.22

sattvam rajas tama iti
 sthity-utpatty-anta-hetavah
rajasotpadyate visvam
 anyonyam vividham jagat
 
Translation: 
 
The causes of creation, maintenance and destruction are the three modes of nature — namely goodness, passion and ignorance. In particular, the mode of passion creates this universe and through sexual combination causes it to become full of variety.
 
Purport: 
 
Anticipating the possible objection that a livelihood based on cows certainly depends on Lord Indra, who supplies rain, Lord Krsna here introduces a mechanistic theory of existence known as atheistic Sankhya. The tendency to attribute exclusive causality to the apparently mechanistic functions of nature is an old tendency indeed. Five thousand years ago Lord Krsna referred to a doctrine already well known in human society.
Srimad Bhagavatam Canto 10, Chapter 24, Text 21
Srimad Bhagavatam Canto 10, Chapter 24, Text 23