उमामहेश्वरव्रतं—पञ्चाक्षरमन्त्रस्य माहात्म्यं, न्यासः, जपविधिः, सदाचारः, विनियोगः
ते लब्ध्वा मन्त्ररत्नं तु साक्षाल्लोकपितामहात् तमाराधयितुं देवं परात्परतरं शिवम्
te labdhvā mantraratnaṃ tu sākṣāllokapitāmahāt tamārādhayituṃ devaṃ parātparataraṃ śivam
Having received that jewel among mantras directly from Brahmā, the grandsire of the worlds, they set out to worship Śiva—higher than the highest, the supreme Pati beyond all.
Suta Goswami (narrating the Purana; internal reference to Brahma as giver of the mantra)
It frames Linga-oriented Shiva-aradhana as mantra-rooted: the right mantra (mantraratna) received through an authoritative source becomes the means to approach and worship Pati (Śiva) effectively.
Śiva is called “parātparatara”—beyond even the highest principle—indicating him as the supreme Pati, transcendent to pasha (bondage) and the conditioned pashu (soul), yet worship-worthy and accessible through mantra and devotion.
Mantra-prāpti (receiving an empowered mantra) followed by ārādhana (propitiatory worship), aligning with Pāśupata discipline where mantra, observance, and focused devotion lead the pashu toward Shiva’s grace.