Matsya Purana — Śrāddha Procedure: Types
आधत्त पितरो गर्भम् अत्र संतानवर्धनम् तावदुच्छेषणं तिष्ठेद् यावद्विप्रा विसर्जिताः //
ādhatta pitaro garbham atra saṃtānavardhanam tāvaduccheṣaṇaṃ tiṣṭhed yāvadviprā visarjitāḥ //
Here the Pitṛs (ancestral spirits) bestow conception and increase of progeny. Therefore, one should keep the remaining food (the leavings of the rite/meal) in place until the Brahmins have been formally dismissed.
This verse is not about Pralaya; it teaches ritual causality—honoring the Pitṛs through proper śrāddha etiquette is said to support conception and the growth of one’s lineage.
It instructs the householder (and by extension a ruler who models dharma) to maintain śrāddha discipline: keep the ritual food-remnants undisturbed and complete the rite properly by formally dismissing the invited Brahmins.
Ritual significance: the ‘ucchēṣaṇa’ (remnants) must remain until the vipras are respectfully sent off, reflecting strict procedural timing in ancestral rites and Brahmin-feeding protocols.