Matsya Purana — Soma
तेषां लोकान्तरस्थानां बान्धवैर्नामगोत्रतः भूमावसव्यं दर्भेषु दत्ताः पिण्डास्त्रयस्तु वै प्राप्तांस्तु तर्पयन्त्येव प्रेतस्थानेष्वधिष्ठितान् //
teṣāṃ lokāntarasthānāṃ bāndhavairnāmagotrataḥ bhūmāvasavyaṃ darbheṣu dattāḥ piṇḍāstrayastu vai prāptāṃstu tarpayantyeva pretasthāneṣvadhiṣṭhitān //
For those who have gone to another realm, their kinsmen—invoking their name and gotra (lineage)—should place three piṇḍa-offerings on the ground upon darbha grass, keeping them to the left (asavya). Having been offered, these piṇḍas indeed satisfy those who abide in the state and stations of the preta (the departed).
This verse is not about Pralaya; it focuses on post-death ritual protocol (piṇḍa-dāna and tarpaṇa) and how offerings reach and satisfy the departed in the preta-state.
It frames a key gṛhastha-dharma duty: relatives must perform śrāddha-related offerings by correctly stating the deceased’s name and gotra and placing the prescribed piṇḍas, ensuring the departed are supported during the preta phase.
Ritually, it specifies method and orientation: three piṇḍas are placed on darbha grass on the ground, with an asavya (leftward/left-side) placement—technical details crucial for correct preta-kriyā performance.