The Great Epic of the Bhārata dynasty 12.181.9

12.181.9

jaṅgamānāmasaṃkhyeyāḥ sthāvarāṇāṃ ca jātayaḥ |
teṣāṃ vividhavarṇānāṃ kuto varṇaviniścayaḥ || 9 ||

"Bharadwaja said, 'If the distinction between the four orders (of human beings) be made by means only of colour (attribute), then it seems that all the four orders have been mingled together. Lust, wrath, fear, cupidity, grief, anxiety, hunger, toil, possess and prevail over all men. How can men be distinguished by the possession of attributes? The bodies of all men emit sweat, urine, faeces, phlegm, bile, and blood. How then can men be distributed into classes? Of mobile objects the number is infinite; the species also of immobile objects are innumerable. How, then, can objects of such very great diversity be distributed into classes?'