Matsya Purana — Brahmā–Gāyatrī as a Divine Pair and the Early Genealogies of Creation
*ब्रह्मोवाच वैवस्वते ऽन्तरे प्राप्ते यादवान्वयसम्भवः रामो नाम यदा मर्त्यो मत्सत्त्वबलमाश्रितः //
*brahmovāca vaivasvate 'ntare prāpte yādavānvayasambhavaḥ rāmo nāma yadā martyo matsattvabalamāśritaḥ //
Brahmā said: When the Vaivasvata Manvantara had arrived, there arose in the Yādava lineage a mortal named Rāma, who relied upon the power and strength of the Matsya (Fish) nature.
It situates the narrative in the Vaivasvata Manvantara (a cosmic administrative age after a cycle), implying post-dissolution continuity of lineages rather than describing Pralaya directly.
Indirectly, it frames righteous rule and lineage continuity within Manvantara order—kings and householders are understood to uphold dharma so dynasties (like the Yādavas) endure across ages.
None is stated explicitly; the verse is primarily chronological and genealogical, not a Vastu Shastra or ritual-procedure instruction.