Matsya Purana — Description of Gomedaka and Puṣkara Dvīpas; the Lokāloka Boundary; Ocean Tide...
निगीर्णत्वाच्च गिरयः पर्वबन्धाच्च पर्वताः शाकद्वीपे तु वै शाकः पर्वतस्तेन चोच्यते //
nigīrṇatvācca girayaḥ parvabandhācca parvatāḥ śākadvīpe tu vai śākaḥ parvatastena cocyate //
They are called ‘girayaḥ’ (mountains) because they have been ‘swallowed/engulfed’; and they are called ‘parvatāḥ’ because they are ‘bound with joints/knots’ (parva-bandha). In Śākadvīpa, indeed, there is a mountain named Śāka; therefore it is spoken of by that name.
This verse does not describe Pralaya directly; it belongs to cosmography and explains traditional name-derivations for ‘mountain’ while identifying a key mountain of Śākadvīpa.
It is not a dharma injunction; its practical relevance is indirect—Purāṇic geography frames pilgrimage imagination and the kingly ideal of knowing the world-order (lokasaṃgraha) described in śāstra.
No direct Vāstu or ritual rule is stated; however, the emphasis on ‘parva-bandha’ (structural joints/segments) echoes a broader Indian habit of explaining forms through structural principles—useful context when reading Matsya Purana Vāstu Śāstra chapters.