Matsya Purana — Kārtavīrya Arjuna’s Solar Boon and the Genealogy from Kroṣṭu to the Yādava Lines
सात्वतः सत्त्वसंयुक्तः सात्वतां कीर्तिवर्धनः इमां विसृष्टिं विज्ञाय ज्यामघस्य महात्मनः प्रजावान् एति सायुज्यं राज्ञः सोमस्य धीमतः //
sātvataḥ sattvasaṃyuktaḥ sātvatāṃ kīrtivardhanaḥ imāṃ visṛṣṭiṃ vijñāya jyāmaghasya mahātmanaḥ prajāvān eti sāyujyaṃ rājñaḥ somasya dhīmataḥ //
Sātvata—endowed with true goodness and a cause of increased fame for the Sātvatas—having understood this account of the unfolding lineage of the great-souled Jyāmagha, is blessed with progeny and attains sāyujya, union with the wise King Soma.
This verse is not about Pralaya; it is a phalaśruti stating the spiritual and worldly benefit (progeny and sāyujya) gained by understanding a dynastic narrative.
It reinforces the Purāṇic householder ideal that preserving and learning lineage-history (vaṃśa), honoring noble ancestors, and engaging in sacred listening/recitation supports prajā (progeny and continuity) and leads toward higher spiritual attainment.
No Vāstu or temple-rule detail is stated here; the ritual takeaway is the phalaśruti principle—hearing/knowing the Purāṇic account itself is treated as merit-bearing.