उमामहेश्वरव्रतं—पञ्चाक्षरमन्त्रस्य माहात्म्यं, न्यासः, जपविधिः, सदाचारः, विनियोगः
जपादेव न संदेहो व्रतानां वै विशेषतः समाप्तिर्नान्यथा तस्माज् जपेत्पञ्चाक्षरीं शुभाम्
japādeva na saṃdeho vratānāṃ vai viśeṣataḥ samāptirnānyathā tasmāj japetpañcākṣarīṃ śubhām
唯以持诵(japa)而已,毫无疑惑——尤其就诸誓戒而言——其真实圆满非他法可得。故当反复持诵吉祥的五字真言“Pañcākṣarī”。
Suta Goswami (narrating the Linga Purana teaching to the sages of Naimisharanya)
It teaches that external observances become spiritually complete through Śiva-mantra japa—especially the Pañcākṣarī—making mantra the inner core of Linga-pūjā and vrata.
Śiva as Pati is approached through the vibration of His mantra; japa becomes a direct means for the pashu (soul) to turn inward and move toward Śiva-tattva, beyond mere outer ritual.
Mantra-japa of the Pañcākṣarī (Namaḥ Śivāya), aligned with Pāśupata-oriented discipline where repeated remembrance purifies the mind and weakens pāśa (bondage).