उमामहेश्वरव्रतं—पञ्चाक्षरमन्त्रस्य माहात्म्यं, न्यासः, जपविधिः, सदाचारः, विनियोगः
सूर्यं नित्यमुपस्थाय सम्यगारोग्यमाप्नुयात् नदीतोयेन सम्पूर्णं घटं संस्पृश्य शोभनम्
sūryaṃ nityamupasthāya samyagārogyamāpnuyāt nadītoyena sampūrṇaṃ ghaṭaṃ saṃspṛśya śobhanam
日々太陽神に礼拝し奉れば、円満なる健やかさを得る。河水を満たした麗しき器に触れること(浄めの作法)により、吉祥となり、礼拝にふさわしく心整う—戒律ある修行によって、パティたるシヴァへと進むに適う。
Suta Goswami (narrating to the sages of Naimisharanya)
It frames daily Sun-veneration and water-based purification as preparatory disciplines that make the practitioner fit (śobhana) for Śiva-pūjā, supporting steadiness and cleanliness required for Linga worship.
Implicitly, it presents Śiva as Pati approached through niyama (regulated observance): the pashu refines body and conduct (health and purity) to lessen pasha-like impediments and become capable of higher worship.
Nitya-sūryopasthāna (daily reverence to the Sun) and śauca via touching a river-water-filled vessel—basic pūrvāṅga (preliminaries) that support disciplined sādhana aligned with Pāśupata-oriented purity and self-regulation.