Matsya Purana — The Syamantaka Jewel Episode and the Vrishni–Sainya Genealogies
सदायज्ञो ऽतिवीरश्च श्रुतवानतिथिप्रियः अक्रूरः सुषुवे तस्मात् सदायज्ञो ऽतिदक्षिणः //
sadāyajño 'tivīraśca śrutavānatithipriyaḥ akrūraḥ suṣuve tasmāt sadāyajño 'tidakṣiṇaḥ //
From him was born Akrūra—ever devoted to sacrifice (yajña), exceedingly valiant, learned in sacred lore, and fond of honoring guests. From Akrūra, in turn, was born Sadāyajña, renowned for great generosity in the giving of dakṣiṇā (ritual gifts).
This verse does not address pralaya; it is a genealogical note highlighting ideal virtues—sacrifice, learning, hospitality, and generosity—within a lineage.
It praises core dharmic duties: maintaining yajña (ritual responsibility), honoring guests (atithi-sevā), cultivating sacred learning (śruti/śāstra), and giving dakṣiṇā (generosity)—all central to the householder ethic and exemplary rulership.
Ritually, it emphasizes yajña and dakṣiṇā as markers of orthodox practice; there is no direct Vāstu or temple-architecture rule in this specific verse.