Narada Purana — Purva Bhaga, Shloka 30
Śeṣoditya-Sūrya-nyāsa, Soma-sādhana, Graha-pūjā, and Bhauma-vrata-vidhi
संपूज्य मध्ये वादित्यं रविं भानुं च भास्करम् । सूर्यं दिशासु सद्यादिपंच ह्रस्वादिकानिमान् ॥ ३० ॥
saṃpūjya madhye vādityaṃ raviṃ bhānuṃ ca bhāskaram | sūryaṃ diśāsu sadyādipaṃca hrasvādikānimān || 30 ||
中央においてアーディティヤ（太陽神）を、ラヴィ・バーヌ・バースカラ・スーリヤとして正しく供養したのち、諸方位に「sad-」に始まる五つの群を配し、さらに短母音（hrasva）およびそれに連なる母音の諸形をも配置すべきである。
Narada (within the Narada–Sanatkumara dialogue frame)
Vrata: none
Primary Rasa: adbhuta
Secondary Rasa: shanta
FAQs
It presents the Sun (Āditya) as the ritual and symbolic center, indicating that illumination, order, and sacred speech are grounded in the solar principle before arranging technical mantra/phonetic elements in the quarters.
Even in a technical (Vedanga) setting, it begins with reverent worship of Āditya by multiple divine epithets, showing that correct practice is meant to be preceded by devotion and honoring the deity invoked.
It reflects Shiksha-style technical arrangement—placing defined groups (a fivefold set and the hrasva/short-vowel class and related forms) in specific directions, a hallmark of disciplined recitation and ritual phonetics.