Matsya Purana — Catalogue of the Eighteen Puranas
*सूत उवाच इदमेव पुराणेषु पुराणपुरुषस्तदा यदुक्तवान्स विश्वात्मा मनवे तन्निबोधत //
*sūta uvāca idameva purāṇeṣu purāṇapuruṣastadā yaduktavānsa viśvātmā manave tannibodhata //
Sūta said: “This indeed is what, in the Purāṇas, the Primeval Person (Purāṇa-Puruṣa)—He who is the Soul of the universe (Viśvātman)—once spoke to Manu. Now understand that.”
Indirectly, it frames the teaching as an authoritative revelation spoken by the cosmic Lord to Manu—Manu being the key figure associated with the flood/pralaya narrative—though this verse itself is an introduction rather than a description of dissolution.
By grounding the forthcoming instruction in what the universal Lord taught Manu (the archetypal lawgiver), the verse signals that the guidance to follow carries normative authority for dharma—applicable to rulers and householders as Purāṇic ethical teaching.
No specific Vāstu or ritual procedure is stated here; the verse functions as a preface establishing that the upcoming material—potentially including rites, vows, and temple/architectural rules in later sections—is divinely sourced and should be carefully understood.