Matsya Purana — War of Devas and Asuras; Birth of Aurva Fire; Countering Tamasī Māyā through ...
प्रभातकाले सम्प्राप्ते काङ्क्षितव्ये समागमे भगवंस्तर्पितः पुत्रः कैर्हव्यैः प्राप्स्यते सुखम् //
prabhātakāle samprāpte kāṅkṣitavye samāgame bhagavaṃstarpitaḥ putraḥ kairhavyaiḥ prāpsyate sukham //
When the morning hour has arrived—at the longed-for occasion of reunion—a son, having offered tarpaṇa to the Lord, attains happiness through the rite of offerings to the Pitṛs (kairhavyas).
This verse is not about pralaya; it focuses on ritual efficacy—specifically the auspicious timing (morning) and the spiritual fruit of tarpaṇa and ancestral offerings leading to well-being.
It aligns with gṛhastha-dharma and rāja-dharma in supporting Pitṛ-yajña: performing morning tarpaṇa and śrāddha-type offerings is presented as a means to secure happiness and familial prosperity (including the welfare of a son).
The significance is ritual (not architectural): it stresses proper kāla (timing)—prabhāta (morning)—and the linkage between tarpaṇa to Bhagavān and kairhavyāḥ (ancestral oblations) as a procedure that yields sukha (beneficial results).