उमामहेश्वरव्रतं—पञ्चाक्षरमन्त्रस्य माहात्म्यं, न्यासः, जपविधिः, सदाचारः, विनियोगः
विश्वामित्र ऋषिस्त्रिष्टुप् छन्दो विष्णुस्तु दैवतम् वाकारो हेमवर्णो ऽस्य स्थानं चैवोत्तरं मुखम्
viśvāmitra ṛṣistriṣṭup chando viṣṇustu daivatam vākāro hemavarṇo 'sya sthānaṃ caivottaraṃ mukham
Para isto, o ṛṣi é Viśvāmitra, o metro é Triṣṭubh e a divindade regente é Viṣṇu. O bīja é “va”, de cor dourada; e o seu assento é a face do Norte — assim se declara a sua colocação.
Suta Goswami (narrating mantra-viniyoga details within the Purva-Bhaga)
It gives the viniyoga framework—rishi, chandas, devatā, bīja, color, and directional placement—used to sanctify recitation and nyāsa before Linga-centered japa or pūjā.
By assigning Viṣṇu as devatā within a Shaiva textual setting, it reflects the Purāṇic teaching that Pati (Śiva) can be approached through integrated devatā-tattvas—without collapsing distinctions—showing unity of sacred functions while Śiva remains the liberating Lord beyond pāśa.
Mantra-viniyoga and nyāsa: establishing the mantra’s rishi–meter–deity identity and placing it to the “northern face,” a directional discipline supporting focused japa and Pāśupata-style inner alignment.