Matsya Purana — The Greatness of Prayaga and the Supremacy of Cow-Donation
सिद्धचारणगन्धर्वैः पूज्यते दिवि दैवतैः ततः स्वर्गात्परिभ्रष्टो जम्बूद्वीपपतिर्भवेत् //
siddhacāraṇagandharvaiḥ pūjyate divi daivataiḥ tataḥ svargātparibhraṣṭo jambūdvīpapatirbhavet //
Honoured in heaven by the Siddhas, Cāraṇas, and Gandharvas, and worshipped there by the gods, he then—when his merit in Svarga is exhausted and he falls from heaven—becomes the sovereign lord of Jambūdvīpa.
This verse does not describe Pralaya; it teaches karmic progression—after enjoying Svarga due to merit, one returns to the mortal realm and may attain worldly sovereignty.
It frames kingship as a fruit of accumulated merit (puṇya): righteous conduct, generosity, and dharmic governance can lead to exalted status—first celestial honour, then legitimate worldly rule.
No specific Vāstu or temple-architecture rule is stated; the ritual implication is the broader Purāṇic idea that worship and dharmic acts generate merit that yields both heavenly honour and later worldly authority.