Charak Samhita
इच्छत्युभयमेतत्तु ज्वरो व्यामिश्रलक्षणः। योगवाहः परं वायुः संयोगादुभयार्थकृत् ॥३८॥
However, when both of these types of doshas get mixed then such patient manifests both the kinds of symptoms. [Attenuating nature of vata dosha] Vata dosha is exceedingly yogavahi (which accentuates the properties of others) in nature.
english translation
icchatyubhayametattu jvaro vyAmizralakSaNaH। yogavAhaH paraM vAyuH saMyogAdubhayArthakRt ॥38॥
hk transliteration by Sanscript