Matsya Purana — The Greatness and Procedure of the Aṅgāra
विरोचन इति प्राहुस् तस्मात्त्वां देवदानवाः शूद्रेण क्रियमाणस्य व्रतस्य तव दर्शनात् ईदृशीं रूपसम्पत्तिं दृष्ट्वा विस्मितवानहम् //
virocana iti prāhus tasmāttvāṃ devadānavāḥ śūdreṇa kriyamāṇasya vratasya tava darśanāt īdṛśīṃ rūpasampattiṃ dṛṣṭvā vismitavānaham //
They call you “Virocana”; therefore the gods and the Dānavas alike—having witnessed your vow (vrata) being performed even by a Śūdra—on seeing such splendor of form in you, I have become amazed.
This verse does not discuss Pralaya; it highlights the visible fruit of dharmic observance (vrata)—radiance, reputation, and astonishment even among gods and Dānavas.
It underscores that disciplined vows and ethical observances are central to dharma; a householder (and by extension a ruler) gains authority and esteem through visible self-restraint and ritual integrity.
The ritual significance is the power of a vrata: even when performed by a Śūdra, it is portrayed as efficacious and capable of producing notable “rūpa-sampatti” (splendor), emphasizing inclusivity of merit through proper observance.