उमामहेश्वरव्रतं—पञ्चाक्षरमन्त्रस्य माहात्म्यं, न्यासः, जपविधिः, सदाचारः, विनियोगः
समक्षं यदि तत्सर्वं कर्तव्यं गुर्वनुज्ञया गुरोर्देवसमक्षं वा न यथेष्टासनो भवेत्
samakṣaṃ yadi tatsarvaṃ kartavyaṃ gurvanujñayā gurordevasamakṣaṃ vā na yatheṣṭāsano bhavet
若这一切要在师前当面行持,则唯应依上师许可而行;并且在上师面前或在神前,不可随意以自己喜欢的坐姿(āsana)而坐。
Suta Goswami (narrating Shiva-dharma/puja-niyamas within the Linga Purana discourse)
It establishes puja-śiṣṭācāra: Linga worship and related rites should be done under the Guru’s sanction, and with disciplined bodily conduct before the Deity—protecting the sanctity of upāsanā and making the sādhaka receptive to Śiva’s anugraha.
By requiring reverent restraint in the Deva’s presence, it implies Śiva as Pati (the sovereign Lord) whose sannidhi demands niyama and vinaya; the pashu approaches liberation not by whim, but by alignment to dharma and Guru-guided worship.
Guru-anugraha and temple/puja etiquette: do not assume casual postures before the Guru or the deity; maintain prescribed āsana and disciplined comportment as part of Shaiva puja-vidhi and Pāśupata-style sādhana.