Matsya Purana — Genealogy of Kaśyapa: Ādityas
हिरण्याक्षस्य पुत्रो ऽभूद् उलूकः शकुनिस्तथा भूतसंतापनश् चैव महानाभस्तथैव च //
hiraṇyākṣasya putro 'bhūd ulūkaḥ śakunistathā bhūtasaṃtāpanaś caiva mahānābhastathaiva ca //
Hiraṇyākṣa had sons—Ulūka, Śakuni, Bhūtasaṃtāpana, and also Mahānābha.
This verse is genealogical rather than cosmological; it preserves lineage data about Hiraṇyākṣa’s descendants, not a direct teaching on Pralaya.
Indirectly, it supports the Purāṇic model of dharma through ancestry and historical memory—useful for royal/householder identity, succession, and the moral framing of dynasties—though no explicit duty is stated here.
None is stated in this verse; it is a name-list within the Matsya Purana’s genealogical narration, not a Vastu or ritual instruction.