Mahabharata — Ashvamedhika Parva, Shloka 476
Mind as Charioteer; Kṣetrajña, Tapas, and Dhyāna-Yoga
Adhyātma-Upadeśa
विज्ञेयं ब्राह्मणैर्वद्धेर्धर्मज्ै: सत्यवादिभि: । शुक्रल
vijñeyaṃ brāhmaṇair vṛddhair dharmajñaiḥ satyavādibhiḥ | śuklaḥ kṛṣṇaḥ raktaḥ nīlaḥ pītaḥ aruṇaḥ kṣudraḥ bṛhat sthūlaḥ kṛśaḥ caturaśraḥ vṛttaḥ—iti prakāreṇa taijasa-rūpasya dvādaśa-vidhaḥ vistāraḥ satyavādibhir dharmajñair vṛddha-brāhmaṇaiḥ jñātavya iti ucyate ||
风神曰：“此理当从年迈而真实、通达法（dharma）的婆罗门处求知。火之光明形相被教为十二种展开：白、黑、赤、青、黄、赭（黄褐）；小、大；厚、薄；方与圆。此乃守法而诚言的长老所宣示，宜当知之。”
वायुदेव उवाच
Educational Q&A
Knowledge about subtle or luminous reality (taijasa-rūpa) should be learned from reliable authorities—elders who are both truthful (satyavādin) and grounded in dharma (dharmajña). The verse links epistemic trustworthiness with ethical character.
Vāyu is instructing the listener by presenting a doctrinal classification: the ‘luminous/fiery form’ is described as having twelve varieties, distinguished by color and by size/shape. The statement frames this as traditional knowledge transmitted by venerable Brahmins.