Matsya Purana — Śrāddha Procedure: Types
जान्व् आच्य सव्यं यत्नेन दर्भयुक्तो विमत्सरः विधाय लेखा यत्नेन निर्वापेष्ववनेजनम् //
jānv ācya savyaṃ yatnena darbhayukto vimatsaraḥ vidhāya lekhā yatnena nirvāpeṣvavanejanam //
With care, he should bend the left knee, remaining free from malice and equipped with darbha grass. Then, having carefully drawn the prescribed lines, he should perform the washing/purificatory rinsing at the places of offering (nirvāpa).
This verse is not about Pralaya; it focuses on precise ritual conduct—posture, ritual markings (lekhā), and purification (avanejana) during an offering procedure.
It reinforces the householder’s (and thus the king’s) duty to perform rites with discipline, purity, and a non-malicious mindset—key ethical conditions for Śrāddha-style offerings and dharmic maintenance.
Ritually, it prescribes (1) using darbha, (2) adopting a specific posture (left side/left knee), (3) drawing demarcation lines (lekhā) for the rite, and (4) performing avanejana (purificatory rinsing) at the nirvāpa offering spots.