Matsya Purana — Account of the Manvantaras: Manus
विवस्वानतिनामा च षष्ठे सप्तर्षयो ऽपरे चाक्षुषस्यान्तरे देवा लेखा नाम परिश्रुताः //
vivasvānatināmā ca ṣaṣṭhe saptarṣayo 'pare cākṣuṣasyāntare devā lekhā nāma pariśrutāḥ //
In the sixth Manvantara, Vivasvān and Ati are mentioned, and there are other Saptarṣis as well. In the Cākṣuṣa Manvantara, the gods are renowned by the name Lekhā.
It does not describe Pralaya directly; it catalogs Manvantara administrations—named beings, Saptarṣis, and a class of gods (Lekhā) for the Cākṣuṣa Manvantara—showing how cosmic governance is organized across time cycles.
Indirectly, it supports the Purāṇic idea of dharma being maintained through orderly cosmic and social administration; by knowing Manvantara lineages and divine orders, kings and householders align rites, ancestral memory, and governance with sacred chronology.
No Vāstu or temple rule is stated here; the ritual takeaway is chronological—Manvantara-identifications are used in Purāṇic framing for recitations, calendrical memory, and situating lineages within sacred time.