Matsya Purana — The Greatness and Procedure of the Aṅgāra
अग्निर्मूर्धा दिवो मन्त्रं जपन्नास्ते उदङ्मुखः शूद्रस्तूष्णीं स्मरन्भौमम् आस्ते भोगविवर्जितः //
agnirmūrdhā divo mantraṃ japannāste udaṅmukhaḥ śūdrastūṣṇīṃ smaranbhaumam āste bhogavivarjitaḥ //
With Agni as the foremost (‘head’), one should sit facing north and recite the heavenly mantra. But a Śūdra should sit in silence, remembering what is earthly (bhauma), and remain free from indulgence.
This verse does not discuss Pralaya directly; it focuses on disciplined ritual practice—directional sitting, japa, and restrained conduct—rather than cosmological dissolution.
It reflects the broader Matsya Purana ethic that rulers and householders should uphold ordered, disciplined worship: proper orientation (north-facing), regulated mantra practice, and personal restraint—principles that support social and ritual order.
Ritually, it prescribes orientation (udaṅmukha—facing north) for mantra-japa and emphasizes austerity and silence as valid modes of observance, indicating that correct direction and disciplined demeanor are integral to effective practice.