Matsya Purana — Tripura Takes Refuge in the Ocean; Maya’s Hidden Nectar-Reservoir and the God...
सिंहनादं ततः कृत्वा देवा देवरथं च तम् परिवार्य ययुर्हृष्टाः सायुधाः पश्चिमोदधिम् //
siṃhanādaṃ tataḥ kṛtvā devā devarathaṃ ca tam parivārya yayurhṛṣṭāḥ sāyudhāḥ paścimodadhim //
Then, having raised a lion-like battle-cry, the gods—glad at heart and armed—surrounded that divine chariot and marched toward the western ocean.
This verse does not describe pralaya; it depicts a wartime mobilization—armed gods raising a siṃhanāda and advancing toward the western ocean.
Indirectly, it models dharmic resolve and disciplined action: collective protection (parivārya) and readiness (sāyudhāḥ) reflect ideals of organized defense and leadership in crisis.
No Vāstu or ritual procedure is specified; the key motif is the siṃhanāda (martial cry) and the procession around a devaratha, useful mainly for narrative and iconographic context (gods with weapons and chariot).