Matsya Purana — Paurava Genealogy
क्षत्रस्य विजयं ज्ञात्वा ततःप्रभृति सर्वशः अभिगम्य स्थिताश्चैव नृपं च जनमेजयम् //
kṣatrasya vijayaṃ jñātvā tataḥprabhṛti sarvaśaḥ abhigamya sthitāścaiva nṛpaṃ ca janamejayam //
Knowing that the Kṣatriyas had gained victory, from that time onward people from every side came forth, approached, and stood before King Janamejaya.
This verse does not address Pralaya; it focuses on political aftermath—how people gather at Janamejaya’s court after a Kshatriya victory.
It reflects royal duty in practice: after victory, subjects and allies assemble at the king’s court, implying the king’s role as a public center for protection, adjudication, and governance.
No explicit Vastu or ritual procedure is mentioned; the scene is a courtly assembly (people approaching and standing before the king), useful mainly for historical-political context rather than temple architecture rules.