Matsya Purana — Catalogue of the Eighteen Puranas
एतदेव यदा पद्मम् अभूद्धैरण्मयं जगत् तद्वृत्तान्ताश्रयं तद्वत् पाद्ममित्युच्यते बुधैः पाद्मं तत्पञ्चपञ्चाशत्सहस्राणीह कथ्यते //
etadeva yadā padmam abhūddhairaṇmayaṃ jagat tadvṛttāntāśrayaṃ tadvat pādmamityucyate budhaiḥ pādmaṃ tatpañcapañcāśatsahasrāṇīha kathyate //
When this very world became a golden lotus, the narrative grounded in (and concerning) that event is therefore called the Padma (Purāṇa) by the wise. Here it is said that the Padma (Purāṇa) consists of fifty-five thousand verses.
It alludes to a cosmogonic image— the world appearing as a ‘golden lotus’—as a defining event/theme, using it to explain the title ‘Padma’; it does not directly describe Pralaya here, but signals creation-symbolism through the lotus motif.
Indirectly: it models the Purāṇic method of preserving authoritative accounts (vṛttānta) and their proper enumeration, supporting the king/householder’s dharmic life through reliable sacred history rather than prescribing a specific duty in this line.
No explicit Vāstu or ritual rule is stated; the main significance is textual—name-derivation and verse-count—though the lotus symbol later informs temple iconography and sacred layout motifs in broader Purāṇic tradition.