Matsya Purana — Yadu Lineage
प्रह्लादस्य हते तस्मिंस् त्रैलोक्ये कालपर्ययात् पर्यायेण तु सम्प्राप्ते त्रैलोक्यं पाकशासने ततो ऽसुरान्परित्यज्य शुक्रो देवानगच्छत //
prahlādasya hate tasmiṃs trailokye kālaparyayāt paryāyeṇa tu samprāpte trailokyaṃ pākaśāsane tato 'surānparityajya śukro devānagacchata //
When Prahlāda was slain, by the turning of Time in the three worlds the appointed cycle arrived, and the sovereignty of the three worlds came to Pākaśāsana (Indra). Then Śukra, abandoning the Asuras, went over to the Devas.
It does not describe Pralaya; it emphasizes kāla-paryaya—the cyclical turning of Time—by which sovereignty over the three worlds shifts between powers.
By highlighting that rule changes with time and merit, it implies a king’s duty is to govern dharmically without arrogance, knowing sovereignty is cyclical and not permanently possessed.
No Vāstu or ritual procedure is specified in this verse; it is a historical-cosmic note about political authority in the trailokya and Śukra’s allegiance shift.