References

RArṇ, 14, 20.2
  tasya mantraṃ pravakṣyāmi tridaśairapi durlabham //Context
RArṇ, 14, 123.2
  eṣa siddharasaḥ sākṣāt durlabhastridaśairapi //Context
RCūM, 15, 10.1
  amartyā nirjarāstena saṃjātās tridaśottamāḥ /Context