Bhagavatapurana 3.10.14

3.10.14

kāla-dravya-guṇair asya tri-vidhaḥ pratisaṅkramaḥ /
ādyas tu mahataḥ sargo guṇa-vaiṣamyam ātmanaḥ //

14. The destruction of the Universe is of three kinds (as Nitya, Naimittika, and Prakrita) brought about by Time, substance and gunas; and the production of Mahat is the first (in the series) which consists in Atman's throwing the gunas out of balance, *i.e.*, mixing them in different proportions.