Matsya Purana — Hiranyakashipu’s Boons
ततो देवाश्च नागाश्च गन्धर्वा ऋषिभिः सह वरप्रदानं श्रुत्वैव पितामहमुपस्थिताः //
tato devāśca nāgāśca gandharvā ṛṣibhiḥ saha varapradānaṃ śrutvaiva pitāmahamupasthitāḥ //
Then the gods, the Nāgas, and the Gandharvas—together with the sages—having heard of the granting of the boon, immediately came and presented themselves before Pitāmaha (Brahmā).
This verse does not describe pralaya directly; it depicts a divine assembly gathering before Brahmā after hearing that a boon has been granted, a common narrative setup in creation-era (cosmogonic) episodes.
Indirectly, it models prompt, orderly approach to rightful authority after major decisions (like boons) are made—an ethical pattern echoed in royal and household conduct: hearing important news, responding promptly, and showing due respect in formal audience.
No explicit Vāstu or temple-building rule appears in this verse; its ritual takeaway is the motif of “upasthiti” (reverent attendance) before a presiding deity/creator, paralleling formal assembly and audience protocols in Purāṇic rites.