References

BhPr, 1, 8, 89.1
  brāhmaṇaḥ kṣatriyo vaiśyaḥ śūdraśca khalu jātitaḥ /Context
BhPr, 1, 8, 169.3
  pīto vaiśyo'sitaḥ śūdraścaturvarṇātmakaśca saḥ //Context