Brahmopadeśa: Adhipatitva-kathana, Dharma-lakṣaṇa, and Kṣetra–Kṣetrajña Viveka
Book 14, Chapter 43
अपां धातू रसो नित्यं जिद्नया स तु गृहाते । जिद्दास्थश्न तथा सोमो रसज्ञाने विधीयते,जलका स्वाभाविक गुण रस है, जिसको जिद्ल्ाके द्वारा ग्रहण किया जाता है और जिह्लामें स्थित चन्द्रमा उस रसके आस्वादनमें सहायक होता है
apāṁ dhātū raso nityaṁ jihvayā sa tu gṛhyate | jihvā-sthaś ca tathā somo rasa-jñāne vidhīyate ||
قال فايُو-ديفا: «الذوقُ جوهرٌ أبديٌّ يخصُّ عنصرَ الماء، وتدركه اللسان. والقمرُ (سوما)، المقيمُ في اللسان، قد جُعِل عونًا على معرفةِ الطعم وتذوّقه.»
वायुदेव उवाच
The verse links sense-perception to elemental cosmology: taste (rasa) is rooted in the water-element and is known through the tongue, with Soma (the Moon principle) supporting the capacity to discern and enjoy taste.
Vāyu-deva is explaining a doctrinal mapping of elements, senses, and deities—describing how taste is perceived and assigning Soma a functional presence in the tongue for the cognition of taste.