Matsya Purana — The Observance of Ananta-Tritiya
*मत्स्य उवाच यदुमायाः पुरा देव उवाच पुरसूदनः कैलासशिखरासीनो देव्या पृष्टस्तदा किल //
*matsya uvāca yadumāyāḥ purā deva uvāca purasūdanaḥ kailāsaśikharāsīno devyā pṛṣṭastadā kila //
Lord Matsya said: “Formerly, in response to Umā, the Lord—Purasūdana, the slayer of the demon Pura—spoke while seated upon the peak of Kailāsa, when the Goddess questioned him then indeed.”
This verse does not directly describe Pralaya; it functions as a narrative preface, introducing a prior divine discourse prompted by Umā’s question on Kailāsa.
Indirectly, it signals that the forthcoming teaching is authoritative (spoken by the Lord in response to a formal inquiry). In the Matsya Purana, such framed dialogues often precede dharma-guidance meant to be applied by rulers and householders.
No explicit Vāstu or ritual rule appears in this line; it sets the setting (Kailāsa) and the question-and-answer format that commonly introduces later ritual or doctrinal instructions.