उमामहेश्वरव्रतं—पञ्चाक्षरमन्त्रस्य माहात्म्यं, न्यासः, जपविधिः, सदाचारः, विनियोगः
न्यस्ते मन्त्रे ऽथ सुभगे शङ्करप्रतिमो भवेत् जन्मान्तरकृतं पापम् अपि नश्यति तत्क्षणात्
nyaste mantre 'tha subhage śaṅkarapratimo bhavet janmāntarakṛtaṃ pāpam api naśyati tatkṣaṇāt
Wahai yang berbahagia, apabila mantra telah diletakkan dengan nyāsa menurut tatacara, pengamal menjadi seakan-akan arca Śaṅkara sendiri; bahkan dosa yang terkumpul dari kelahiran-kelahiran lain pun lenyap pada saat itu juga.
Suta Goswami (narrating a Shaiva ritual teaching within the Purva-Bhaga context)
It states that mantra-nyāsa (ritual placement of the Shiva-mantra upon the body and worship) makes the sādhaka fit for Linga-pūjā by instantly burning accumulated pāpa, preparing the pashu (soul) to approach Pati (Shiva).
Shiva-tattva is presented as supremely purifying and transformative: by contact with Shiva-mantra, the limited pashu becomes ‘Śaṅkara-pratima’—a likeness of the Lord—indicating Shiva’s grace that cuts pāśa (bondage) and reveals divine purity.
Mantra-nyāsa—placing the mantra through touch and contemplation (a Pāśupata-leaning preparatory discipline) so the body-mind becomes a fit vessel for Shiva’s presence and for Linga-pūjā.