उमामहेश्वरव्रतं—पञ्चाक्षरमन्त्रस्य माहात्म्यं, न्यासः, जपविधिः, सदाचारः, विनियोगः
स्नाने च संध्ययोश्चैव कुर्यादेकादशेन वै शुचिः पर्वतमारुह्य जपेल्लक्षमतन्द्रितः
snāne ca saṃdhyayoścaiva kuryādekādaśena vai śuciḥ parvatamāruhya japellakṣamatandritaḥ
Remaining pure, one should perform the rite with the elevenfold formula at the time of bathing and at both Sandhyās; then, ascending a mountain, one should tirelessly repeat the mantra one lakṣa (one hundred thousand) times—through disciplined japa, directing the paśu (bound soul) toward Pati (Śiva).
Suta Goswami (narrating Linga Purana teachings to the sages of Naimisharanya; internal instruction style inferred)
It prescribes a Shaiva discipline of purity, Sandhya-linked practice, and sustained mantra-japa (one lakh), framing worship as a transformative sadhana rather than a one-time offering—supporting steady approach to the Linga as Pati (Lord) through repeated remembrance.
Shiva is implied as Pati—the liberating Lord approached through mantra and inner purification; the verse emphasizes that contact with Shiva-tattva is stabilized by regulated practice (niyama) that loosens pasha (bondage) upon the pashu (individual soul).
A Pashupata-leaning japa-vidhi: perform the elevenfold mantra practice during snana and Sandhya, then undertake disciplined one-lakh repetitions in an elevated, secluded place (mountain), indicating tapas-like intensity and concentration.