Matsya Purana — Solar–Lunar Motions
प्रजौषणिः सप्तर्षयो द्वापरेष्विह जज्ञिरे संततिं ते जुगुप्सन्ते तस्मान्मृत्युर्जितस्तु तैः //
prajauṣaṇiḥ saptarṣayo dvāpareṣviha jajñire saṃtatiṃ te jugupsante tasmānmṛtyurjitastu taiḥ //
Here, in the Dvāpara ages, the Seven Seers (Saptarṣi) were born as the sons of Prajauṣaṇi. They renounced progeny (literally, felt aversion toward offspring); therefore, by them death itself was overcome.
It does not describe Pralaya directly; it highlights a lineage of the Saptarishis and a spiritual theme—through renunciation of worldly continuation (progeny), they are said to have ‘conquered death,’ implying transcendence rather than cosmic dissolution.
By contrast: householders preserve lineage through progeny, while certain sages may renounce it for higher aims. The verse underscores that dharma differs by āśrama (life-stage): kings/householders uphold social continuity, whereas renouncers pursue liberation-like victory over death.
No Vāstu/temple-building or ritual procedure is specified in this verse; its focus is genealogical (who was born from whom) and ascetic (renunciation leading to victory over death).