उमामहेश्वरव्रतं—पञ्चाक्षरमन्त्रस्य माहात्म्यं, न्यासः, जपविधिः, सदाचारः, विनियोगः
एतावद् ब्रह्मविद्या च तस्मान्नित्यं जपेद्बुधः पञ्चाक्षरैः सप्रणवो मन्त्रो ऽयं हृदयं मम
etāvad brahmavidyā ca tasmānnityaṃ japedbudhaḥ pañcākṣaraiḥ sapraṇavo mantro 'yaṃ hṛdayaṃ mama
एतावद्ब्रह्मविद्या च तस्मान्नित्यं जपेद्बुधः। पञ्चाक्षरैः सप्रणवो मन्त्रोऽयं हृदयं मम॥
Suta Goswami (narrating the teaching as Shiva’s mantra-instruction within the Purana’s dialogue frame)
It identifies the pañcākṣara joined with Oṃ as Brahmavidyā itself and as Śiva’s “heart,” making mantra-japa an essential inner form of liṅga-pūjā that purifies the paśu and turns consciousness toward Pati.
Śiva is presented as the indwelling essence (hṛdaya) of the liberating mantra—Pati who is directly realized through constant japa, transcending mere ritual into inner awakening.
Nitya-japa (daily, continual repetition) of the praṇava-sahita pañcākṣara—classically understood as “Oṃ Namaḥ Śivāya”—a core discipline aligned with Pāśupata-oriented purification and liberation.