Matsya Purana — Prologue to the Matsya Purana and the Manu–Pralaya Rescue Narrative
पुरा राजा मनुर् नाम चीर्णवान् विपुलं तपः पुत्रे राज्यं समारोप्य क्षमावान् रविनन्दनः //
purā rājā manur nāma cīrṇavān vipulaṃ tapaḥ putre rājyaṃ samāropya kṣamāvān ravinandanaḥ //
Long ago, a king named Manu—patient and forbearing, a descendant of the Sun—performed great austerities, having first entrusted the kingship to his son.
It sets the precondition for the Pralaya narrative: Manu prepares through intense tapas after securing orderly governance, a typical lead-in to the coming deluge episode where Manu becomes the protected progenitor.
It models rajadharma and gṛhastha-dharma: before pursuing renunciation-like austerity, Manu responsibly transfers authority to his son, ensuring social stability rather than abandoning duty.
No direct Vāstu or temple rule is stated; the ritual takeaway is the primacy of tapas (disciplined practice) as a qualifying preparation for receiving divine guidance in the Matsya–Manu tradition.