yadā tu tamasodbhūtaśaktinā samāyukto bhavati tadā pralayaṃ nāśaṃ sarvajagataḥ karoti tamasaḥ pratyayahetutvāt
And when He becomes connected with tamas in its manifest power, then He brings about the dissolution [and] destruction of the entire world, because tamas is conducive to dissolution.