सूर्यरथनिर्णयः (चन्द्रस्य पक्षवृद्धिक्षयविधानम्)
एकरात्रिं सुराः सर्वे पितृभिस्त्वृषिभिः सह सोमस्य कृष्णपक्षादौ भास्कराभिमुखस्य च
ekarātriṃ surāḥ sarve pitṛbhistvṛṣibhiḥ saha somasya kṛṣṇapakṣādau bhāskarābhimukhasya ca
സോമന്റെ കൃഷ്ണപക്ഷാരംഭത്തിൽ, ഭാസ്കരാഭിമുഖരായി, സർവ്വ ദേവന്മാർ പിതൃഗണങ്ങളോടും ഋഷികളോടും കൂടി ഏകരാത്രിവ്രതം ആചരിക്കുന്നു—ഇത് പതി ശിവന്റെ ഋതധർമ്മാനുസൃതമായ പുണ്യാനുഷ്ഠാനമാണ്।
Suta Goswami (narrating the Purana to the sages of Naimisharanya; conveying a calendrical/ritual rule)
It emphasizes that Shiva-oriented worship is not only about mantra and offering, but also about kala (right sacred timing) and niyama (discipline): a one-night observance at the start of Krishna Paksha is presented as ritually potent.
By highlighting Devas, Pitrs, and Rishis acting in harmony with lunar and solar order, the verse implies Shiva as Pati—the sustaining Lord of ṛta—through whom cosmic rhythms become a means for pashus (souls) to reduce pasha (bondage) via regulated worship.
A vrata-like single-night observance (ekarātra) performed at the beginning of the dark fortnight, with the practitioner oriented toward the Sun—suggesting prescribed posture/directionality as part of puja-vidhi rather than an explicit Pashupata yoga technique.