Matsya Purana — The Greatness of Prayaga: Manasa Tirtha
यः स्वदेहं तु कर्तित्वा शकुनिभ्यः प्रयच्छति विहगैरुपभुक्तस्य शृणु तस्यापि यत्फलम् //
yaḥ svadehaṃ tu kartitvā śakunibhyaḥ prayacchati vihagairupabhuktasya śṛṇu tasyāpi yatphalam //
He who, offering up his own body, gives it to the birds—hear also what fruit accrues to one whose body is consumed by winged creatures.
This verse is not about Pralaya; it belongs to a dāna–dharma context, describing the merit-fruit connected with extraordinary self-offering and what happens when the body is consumed by birds.
It frames dharma in terms of compassion and renunciation: even the extreme act of offering one’s body is treated as a meritorious gift, reinforcing the Purana’s broader teaching that charity and self-sacrifice produce spiritual fruit for rulers and householders alike.
No Vāstu or temple-architecture rule is stated here; the significance is ritual-ethical—categorizing an extreme form of dāna (self-offering) and introducing its promised phala (result).