Astanga Hrudaya
वाक्प्रवृत्तिप्रयत्नोर्जाबलवर्णस्मृतिक्रियः। व्यानो हृदि स्थितः कृत्स्नदेहचारी महाजवः॥६॥
its functions are initiation of speech (vak), effort (Prayatna), enthusiasm (Urja), strength (bala) , color, complexion (varna) and memory (smruti). Vyana Vata –Vyana is located in the heart, moves all over the body in great speed,
english translation
vAkpravRttiprayatnorjAbalavarNasmRtikriyaH। vyAno hRdi sthitaH kRtsnadehacArI mahAjavaH॥6॥
hk transliteration by Sanscript