Matsya Purana — Indra Sends Soma to Battle: Frost-Weapon
तेषां हिमकरोत्सृष्टाः सपाशा हिमवृष्टयः वेष्टयन्ति स्म तान्घोरान् दैत्यान्मेघगणा इव //
teṣāṃ himakarotsṛṣṭāḥ sapāśā himavṛṣṭayaḥ veṣṭayanti sma tānghorān daityānmeghagaṇā iva //
Against them, the snow-showers released by the Moon—like nooses—wrapped around those dreadful Daityas, just as masses of clouds envelop (all they cover).
It does not describe Pralaya directly; it uses cosmic nature-forces (Moon, snow, clouds) as divine instruments of restraint, reflecting how the Purāṇas portray the cosmos as responsive to dharmic order.
By analogy, it supports the dharmic ideal of niyama (restraint): just as hostile forces are ‘bound’ and contained, a king is expected to restrain violence and disorder through disciplined, proportionate measures.
No direct Vāstu or ritual rule is stated; however, the imagery of ‘binding with pāśa’ and ‘enveloping’ can be read as a general Purāṇic motif of protective containment, often echoed in ritual protection (rakṣā) concepts.