References

RPSudh, 2, 11.1
  baddhastu tena vidhinā kaṭhinatvaṃ prajāyate /Context
RPSudh, 2, 33.1
  kaṭhino vajrasadṛśo jāyate nātra saṃśayaḥ /Context
RPSudh, 2, 90.2
  kaṭhinatvaṃ prayātyeva satyaṃ guruvaco yathā //Context
RPSudh, 6, 81.2
  pāṣāṇagairikaṃ proktaṃ kaṭhinaṃ tāmravarṇakam //Context