Matsya Purana — Yadu Lineage
न भेतव्यं न भेतव्यं भयं त्यजत दानवाः मत्संनिधौ वर्ततां वो न भीर् भवितुमर्हति //
na bhetavyaṃ na bhetavyaṃ bhayaṃ tyajata dānavāḥ matsaṃnidhau vartatāṃ vo na bhīr bhavitumarhati //
“Do not be afraid—do not be afraid. Cast off fear, O Dānavas. While you remain in Matsya’s presence, it is not fitting that you should feel terror.”
It reflects a Pralaya-era motif: amid cosmic danger, those who are under the immediate protection of Lord Matsya are urged to abandon fear, implying divine guardianship even during dissolution.
Ethically, it teaches steadiness and courage: a ruler or householder should act without panic when protected by dharma and rightful refuge—maintaining composure to fulfill duty in crisis.
No direct Vastu or ritual procedure is stated; the takeaway is devotional—fearlessness gained through proximity to the deity, a principle often mirrored in temple/ritual contexts as “seeking refuge” (śaraṇāgati).