सूर्यरथ-कालचक्र-आयनविभागः, संध्योपासनम्, देवयान-पितृयानम्, विष्णुपद-गङ्गावतरणम्
उभयोः काष्ठयोर् मध्ये भ्रमतो मण्डलानि च दिवा नक्तं च सूर्यस्य मन्दा शीघ्रा च वै गतिः
ubhayoḥ kāṣṭhayor madhye bhramato maṇḍalāni ca divā naktaṃ ca sūryasya mandā śīghrā ca vai gatiḥ
आपल्या मार्गाच्या दोन्ही टोकांमध्ये सूर्याची मंडले परिभ्रमण करतात; त्यातूनच दिवस व रात्र उत्पन्न होतात. त्या गतीतच नियत विधीनुसार कधी मंद, कधी शीघ्र अशी त्याची चाल सांगितली जाते.
Sage Parāśara (teaching Maitreya)
This verse links varying solar motion (manda/śīghra) to the structured, law-like order of the cosmos, explaining observable changes in the Sun’s course as part of a regulated celestial cycle.
Parāśara attributes day and night to the Sun’s revolving circuit between two limits of direction (kāṣṭhā), with the Sun’s circular movement producing the alternation of light and darkness.
Even when Vishnu is not named in the verse, the Purāṇic cosmology is presented as an expression of a supreme governing reality—where the Sun’s regulated motion reflects the sovereignty and sustaining order upheld by the Supreme.