Matsya Purana — Solar–Lunar Motions
पूर्णं शतसहस्राणाम् एकत्रिंशच्च सा स्मृता पञ्चाशच्च सहस्राणि तथान्यान्यधिकानि च //
pūrṇaṃ śatasahasrāṇām ekatriṃśacca sā smṛtā pañcāśacca sahasrāṇi tathānyānyadhikāni ca //
Its full extent is remembered as one hundred thousand and thirty-one; and fifty thousand as well—together with other additional portions besides.
This verse does not describe Pralaya directly; it states a traditional numerical measure of the Purana’s total extent, a textual metric rather than a cosmological event.
Indirectly: by preserving and transmitting the correct extent and structure of sacred texts, rulers and householders support dharma through accurate learning, recitation, and patronage of scriptural tradition.
No specific Vāstu or ritual procedure is taught in this verse; its significance is bibliographic—helpful for mapping sections (including Vāstuvidyā chapters) within the Matsya Purana for study and citation.