Matsyapurana 144.6

144.6

dvāpare vyākulo bhūtvā praṇaśyati kalau punaḥ
varṇānāṃ dvāpare dharmāḥ saṃkīryante tathāśramāḥ //

The Varnas become extinct and the actions become deteriorated, the vehicle of usage is spoilt, and vanity, anger, travelling killing, false self-esteem, unforgiving and many other Rajasic qualities spring up There is an increase of Rajo and Tamo gunas The sins that were unknown in Satyayuga crop up in Tretâ, they become strong in Dvâpara and people get troubled Dharma wanes in Dvâpara and becomes extinct in Kaliyuga The Varna dharmas and As'rama dharmas get weakened and doubts are raised in the interpretations of the S'rutis and the Smritis By the uncertainty of the purport of the S'rutis and the Smritis the real intent of dharma becomes obscure which causes a difference in the opinions of men People become divided on account of their diversity of views and a chaotic condition arises—4 9