Matsya Purana — Yadu Lineage
ततस्तेनाभिशापेन नष्टे धर्मे पुनःपुनः लोकस्य च हितार्थाय जायते मानुयेष्विह //
tatastenābhiśāpena naṣṭe dharme punaḥpunaḥ lokasya ca hitārthāya jāyate mānuyeṣviha //
Then, owing to that very curse, whenever Dharma repeatedly declines, he is born again and again among human beings here, for the welfare of the world.
It does not describe Pralaya directly; it highlights the recurring decline of Dharma in cyclic time and the remedial reappearance (birth) undertaken for the world’s welfare.
By stating that restoration happens for loka-hita (public welfare), it aligns with the king’s and householder’s central duty in the Matsya Purana: sustaining Dharma through protection, just conduct, and social order when righteousness weakens.
No Vastu, temple, or ritual procedure is specified in this verse; its significance is doctrinal—Dharma-restoration as the guiding purpose behind repeated births for the common good.