Original: The Tripura-rahasya (The Secret of [the goddess] Tripura) is believed to be an abbreviated version of the original Datta Samhita or Dakshinamurti Samhita traditionally ascribed to Dattatreya.
Simplified: The Tripura-rahasya (The Secret of [the Goddess] Tripura) is believed to be an abbreviated version of the original Datta Samhita or Dakshinamurti Samhita traditionally ascribed to Dattatreya.