Matsya Purana — Kailasa
तस्मात्प्रभवते पुण्या सरयूर्लोकपावनी यस्यास्तीरे वनं दिव्यं वैभ्राजं नाम विश्रुतम् //
tasmātprabhavate puṇyā sarayūrlokapāvanī yasyāstīre vanaṃ divyaṃ vaibhrājaṃ nāma viśrutam //
From that sacred source arises the holy Sarayū, purifier of the worlds; upon her bank lies a divine forest, renowned everywhere by the name Vaibhrāja.
This verse is not about Pralaya; it functions as tirtha-mahatmya, praising the sacred origin and purifying power of the Sarayū and identifying a revered forest on her bank.
By presenting the Sarayū as lokapāvanī (world-purifying), the verse supports the Purāṇic ethic that householders and rulers gain merit through honoring sacred rivers, supporting pilgrimage, and protecting holy groves and riverbanks.
Ritually, it highlights a sanctified riverbank and forest—typical loci for bathing (snāna), offerings, and worship; architecturally, it implies the suitability of such tīrthas for establishing shrines/ashrams, though no direct Vāstu rule is stated in this line.