Matsya Purana — Marks of Karma-yoga and the Five Great Daily Sacrifices
*सूत उवाच एवमेकार्णवे तस्मिन् मत्स्यरूपी जनार्दनः विस्तारमादिसर्गस्य प्रतिसर्गस्य चाखिलम् //
*sūta uvāca evamekārṇave tasmin matsyarūpī janārdanaḥ vistāramādisargasya pratisargasya cākhilam //
Sūta said: Thus, in that single, all-engulfing ocean, Janārdana in the form of a Fish expounded in full detail the primordial creation and also the complete process of re-creation.
It frames the setting as the ekārṇava (single cosmic ocean) associated with pralaya and states that Matsya (Vishnu) teaches both ādi-sarga (primordial creation) and prati-sarga (re-creation after dissolution).
Indirectly, it establishes Vishnu as the authoritative teacher of cosmic order; in the Matsya Purana, dharma for kings and householders is grounded in aligning human conduct with the larger rhythms of creation, dissolution, and restoration.
No direct vastu or ritual rule is stated in this verse; it functions as a cosmological lead-in, which later supports temple/ritual prescriptions by rooting them in the divine structure of sarga and pratisarga.