Matsya Purana — Sādhāraṇa Śrāddha: General Ancestral Rite
एवं शूद्रो ऽपि सामान्यवृद्धिश्राद्धे ऽपि सर्वदा नमस्कारेण मन्त्रेण कुर्यादामान्नतः सदा //
evaṃ śūdro 'pi sāmānyavṛddhiśrāddhe 'pi sarvadā namaskāreṇa mantreṇa kuryādāmānnataḥ sadā //
Thus, even a Śūdra, even in the ordinary śrāddha performed on occasions of family increase or prosperity, should always perform it with the mantra of reverential salutation, consistently offering uncooked food.
This verse is not about pralaya; it focuses on dharma—specifically the correct performance of śrāddha rites and permissible mantras/offerings.
It gives a householder-facing rule: even those with limited Vedic entitlement are directed to perform vṛddhi-śrāddha through a namaskāra-mantra and a simple offering (uncooked food), emphasizing inclusivity and procedural correctness in ancestral rites.
The significance is ritual: the verse prescribes the use of a namaskāra-mantra and specifies āmā-anna (uncooked food) as the mode of offering for this śrāddha context.