Matsya Purana — Śrāddha Procedure: Types
ततः कृत्वान्तरे दद्यात् पत्नीभ्यो ऽन्नं कुशेषु सः तद्वत्पिण्डादिके कुर्याद् आवाहनविसर्जनम् //
tataḥ kṛtvāntare dadyāt patnībhyo 'nnaṃ kuśeṣu saḥ tadvatpiṇḍādike kuryād āvāhanavisarjanam //
Then, after observing the proper interval between the offerings, he should place portions of food for the wives of the invoked ancestors upon the kuśa grass. Likewise, with regard to the piṇḍa offerings and the rest, he should perform the rites of invocation (āvāhana) and dismissal (visarjana).
This verse does not address pralaya; it focuses on śrāddha ritual order—timed offerings, and the formal invitation and dismissal of ancestral presences.
It gives a householder’s dharma: performing ancestral rites correctly—offering food (anna) and piṇḍa with proper sequencing and ritual protocol (āvāhana/visarjana), ensuring completeness and respect in śrāddha.
Ritually, it highlights kuśa as the prescribed medium/seat for offerings and stresses procedural correctness: spacing the offerings and concluding with āvāhana (invocation) and visarjana (dismissal) for piṇḍa and related acts.