References

ÅK, 1, 26, 59.2
  nābhiyantramidaṃ proktaṃ nandinā tattvavedinā //Context
RCūM, 5, 56.2
  nābhiyantramidaṃ proktaṃ nandinā sarvavedinā //Context
RPSudh, 10, 4.2
  dhūpayantraṃ nābhiyantraṃ grastayantraṃ tathaiva ca //Context
RRS, 9, 64.2
  nābhiyantramidaṃ proktaṃ nandinā sarvavedinā /Context