उमामहेश्वरव्रतं—पञ्चाक्षरमन्त्रस्य माहात्म्यं, न्यासः, जपविधिः, सदाचारः, विनियोगः
वाच्यः पञ्चाक्षरैर्देवि शिवस्त्रैलोक्यपूजितः वाचकः परमो मन्त्रस् तस्य पञ्चाक्षरः स्थितः
vācyaḥ pañcākṣarairdevi śivastrailokyapūjitaḥ vācakaḥ paramo mantras tasya pañcākṣaraḥ sthitaḥ
దేవీ, త్రిలోకపూజితుడైన శివుడు పంచాక్షరాలతో వాచ్యుడు; ఆయనను వాచకమైన పరమ మంత్రం కూడా అదే పంచాక్షరరూపంలో స్థితమై ఉంది।
Suta Goswami (narrating an internal Shaiva teaching on the Panchakshara)
It establishes that Śiva, the Pati worshipped in all worlds, is directly invoked and contemplated through the pañcākṣara; thus japa of the five syllables becomes a core limb of Linga-pūjā and inner worship.
Śiva-tattva is presented as the vācya (the ultimate referent): the supreme reality whom the mantra signifies—implying that the sound-form (mantra) functions as a direct pointer to Pati beyond pasha-bound limitations of the paśu.
Pañcākṣara-japa (repetition of the five-syllabled mantra, classically “Namaḥ Śivāya”)—used as mantra-sādhana within Shaiva practice and as a support for Pāśupata-oriented purification of the paśu from pāśa.