Matsya Purana — Tārakāsura’s Austerity and Boon; Mobilization for War; Bṛhaspati’s Fourfold P...
मथनो जम्भकः शुम्भो दैत्येन्द्रा दश नायकाः अन्ये ऽपि शतशस्तस्य पृथिवीदलनक्षमाः //
mathano jambhakaḥ śumbho daityendrā daśa nāyakāḥ anye 'pi śataśastasya pṛthivīdalanakṣamāḥ //
Mathana, Jambhaka, and Śumbha—together with ten foremost leaders among the Daityas—and hundreds of other warriors of that host, were all capable of rending the earth asunder.
It does not directly describe Pralaya; it emphasizes the extraordinary, world-shaking strength attributed to Daitya leaders, a common Purāṇic motif used to frame cosmic-scale conflicts.
Indirectly, it functions as a cautionary backdrop: when destructive powers rise, the king’s dharma is to protect the earth (bhū-rakṣaṇa) and restrain forces that would “split the earth,” preserving social and cosmic order.
No Vāstu or ritual procedure is stated; the phrase “earth-rending” is poetic hyperbole about martial power rather than a technical architectural instruction.