उमामहेश्वरव्रतं—पञ्चाक्षरमन्त्रस्य माहात्म्यं, न्यासः, जपविधिः, सदाचारः, विनियोगः
भक्ष्यं चान्यत्तथा पेयं विषमप्यमृतं भवेत् जपेल् लक्षं तु पूर्वाह्णे हुत्वा चाष्टशतेन वै
bhakṣyaṃ cānyattathā peyaṃ viṣamapyamṛtaṃ bhavet japel lakṣaṃ tu pūrvāhṇe hutvā cāṣṭaśatena vai
饮食与诸物,纵使有毒,亦化为甘露。应于上午诵持真言十万遍,继而入火供养,向火中奉献八百次,确然如是。
Suta Goswami (narrating Shaiva rite instructions within the Linga Purana discourse)
It teaches that disciplined japa and homa, performed as a Shaiva observance, purify what is consumed and remove harmful effects—showing the Linga-centered mantra as a means of cleansing pasha (bondage) for the pashu (soul) under Pati (Shiva).
Shiva-tattva is implied as the supreme purifier: through His mantra and the consecrated fire-offering, even ‘poison’ is transmuted into ‘nectar,’ indicating His grace that converts impurity into auspiciousness and leads the bound soul toward liberation.
A Pashupata-leaning sādhana of mantra-japa (one lakh repetitions in the forenoon) followed by homa (800 oblations), a classic puja-vidhi sequence for mantra-siddhi and purification.