Matsya Purana — How Śrāddha Offerings Reach the Ancestors
प्राणिनः प्रीणयन्त्येते तदाहारत्वमागतान् देवो यदि पिता जातः शुभकर्मानुयोगतः //
prāṇinaḥ prīṇayantyete tadāhāratvamāgatān devo yadi pitā jātaḥ śubhakarmānuyogataḥ //
These offerings gladden living beings who have come to partake of that food. And if, through the performance of auspicious deeds, one’s father has attained the state of a deity, then such offerings please him as well.
It does not address pralaya directly; it focuses on how ritual offerings (food given in rites) reach and satisfy beings, including a father who may have attained a divine state through merit.
It supports the householder/kingly duty of maintaining dharma through śrāddha and charitable food-offerings: feeding recipients is not merely social charity but a karmically effective act that pleases beings and can benefit ancestors.
The significance is ritual rather than architectural: it emphasizes āhāra (food-offering) as the operative medium by which satisfaction (prīti) is conveyed to living beings and to pitṛs who may have risen to a deva-like status.