Matsya Purana — Cosmography of Śākadvīpa and Successive Dvīpas: Mountains
स वै सोमक इत्युक्तो देवैर्यत्रामृतं पुरा संभृतं च हृतं चैव मातुरर्थे गरुत्मता //
sa vai somaka ityukto devairyatrāmṛtaṃ purā saṃbhṛtaṃ ca hṛtaṃ caiva māturarthe garutmatā //
That place was indeed called “Somaka” by the gods—where, in ancient times, the amṛta, nectar of immortality, was gathered, and then also carried off by Garuḍa for the sake of his mother.
This verse does not describe pralaya; it preserves mythic history by linking a place-name (“Somaka”) to the amṛta episode, emphasizing sacred geography rather than cosmic dissolution.
Indirectly, it highlights filial duty: Garuḍa acts “for his mother’s sake,” a Puranic exemplar of honoring and protecting one’s parents—an ethical value repeatedly affirmed for householders and rulers.
No explicit Vāstu or temple rule appears here; the ritual takeaway is tirtha-etiology—places gain sanctity through divine events, supporting pilgrimage, worship, and remembrance of sacred narratives.