Mahabharata — Ashvamedhika Parva, Shloka 486
Mind as Charioteer; Kṣetrajña, Tapas, and Dhyāna-Yoga
Adhyātma-Upadeśa
वायोश्वापि गुण: स्पर्श: स्पर्शश्व॒ बहुधा स्मृतः । शब्द और स्पर्श--ये वायुके दो गुण जानने योग्य कहे जाते हैं। इनमें भी स्पर्श ही वायुका प्रधान गुण है। स्पर्श भी कई प्रकारका माना गया है
vāyoś cāpi guṇaḥ sparśaḥ, śabdaś ca bahudhā smṛtaḥ |
风神开示：风大可由其可感之德相而知——尤以触为要，亦兼有声。于诸相中，触被视为风之主要定相，而此“触”亦有多种差别。此教法并寓含一层德性与心理之旨：正如元素以其主导特性而被识别，人亦以其所培育并外显的主导品质而为人所知。
वायुदेव उवाच
Educational Q&A
Wind is characterized by specific qualities—touch and sound—with touch treated as primary; the broader lesson is that beings (and people) are recognized by their dominant qualities, so one should cultivate the qualities that define a virtuous life.
Vāyu-deva is speaking in a didactic passage, describing the elemental properties of wind and distinguishing its principal attribute (touch), preparing for further classification of how that attribute manifests in different ways.