Matsya Purana — The Devasura War: Tumult
ततो ऽसृघ्रददुस्तारा पृथिवी समजायत नद्यश्च रुधिरावर्ता हर्षदाः पिशिताशिनाम् वेतालाक्रीडमभवत् तत्संकुलरणाजिरम् //
tato 'sṛghradadustārā pṛthivī samajāyata nadyaśca rudhirāvartā harṣadāḥ piśitāśinām vetālākrīḍamabhavat tatsaṃkularaṇājiram //
Then the earth became impassable, as though filled with lakes of blood; and the rivers, swirling with blood, became a delight to flesh-eaters. That crowded field of battle turned into a playground for vetālas (ghoulish spirits).
It uses pralaya-like imagery—blood-filled earth and rivers, and vetālas roaming—to depict extreme disorder and a collapse of normal dharmic order, a common Purāṇic marker of dissolution or catastrophic upheaval.
By portraying a world where violence overwhelms society and predatory beings rejoice, it implicitly underscores the king’s duty to restrain adharma and protect subjects, and the householder’s duty to avoid cruelty and uphold moral order that prevents such societal breakdown.
No direct Vāstu or temple-ritual rule appears; the verse functions as a warning-image of inauspiciousness (aśubha-lakṣaṇa), useful in ritual contexts as a contrast to the purity and order required for yajña, consecration, and sacred building.