Matsya Purana — The Sun-Vow
*नन्दिकेश्वर उवाच यत्तद्विश्वात्मनो धाम परं ब्रह्म सनातनम् सूर्याग्निचन्द्ररूपेण तत्त्रिधा जगति स्थितम् //
*nandikeśvara uvāca yattadviśvātmano dhāma paraṃ brahma sanātanam sūryāgnicandrarūpeṇa tattridhā jagati sthitam //
Nandikeśvara said: That eternal Supreme Brahman—abode of the Universal Self—stands established in the world in a threefold manner, assuming the forms of the Sun, Fire, and the Moon.
It frames cosmic order as rooted in eternal Brahman, manifesting as Sun, Fire, and Moon—principles that govern time, vitality, and ritual continuity across cycles, including pralaya and re-creation.
By identifying Brahman with Sun (dharma/time), Fire (sacrifice/duty), and Moon (nourishment/mind), it implicitly supports household and royal obligations: maintaining yajña (Agni), upholding order under time and law (Sūrya), and ensuring welfare and prosperity (Candra).
Ritually, it elevates Agni as a direct mode of Brahman, reinforcing the centrality of fire-offerings; architecturally/iconographically, it supports temple and altar symbolism that aligns solar, lunar, and fire principles (e.g., orientation, lighting, and deity associations).