Matsya Purana — Sādhāraṇa Śrāddha: General Ancestral Rite
दीपप्रज्वालनं तद्वत् कुर्यात्पुष्पार्चनं बुधः अथाचान्तेषु चाचम्य वारि दद्यात्सकृत्सकृत् //
dīpaprajvālanaṃ tadvat kuryātpuṣpārcanaṃ budhaḥ athācānteṣu cācamya vāri dadyātsakṛtsakṛt //
In the same manner, the wise person should light the lamp and perform worship with flowers. Then, at the conclusion of the rite, having performed ācamana (sipping water for purification), he should offer water repeatedly, again and again.
This verse does not discuss pralaya; it focuses on practical worship procedure—lighting a lamp, offering flowers, and concluding purification with ācamana and repeated water offerings.
It frames household/royal dharma as disciplined daily worship: performing lamp-lighting (dīpa), flower-offering (puṣpārcana), and maintaining ritual purity through ācamana and water offerings at the close of rites.
Ritually, it specifies core pūjā steps—deepa prajvālana and puṣpārcana—followed by ācamana and repeated water offerings as a formal conclusion, useful for standardizing temple or home worship sequences.