Charak Samhita
यदा स्रोतांसि संरुध्य मारुतः कफपूर्वकः । विष्वग्व्रजति संरुद्धस्तदा श्वासान्करोति सः ॥४५॥
[Specific pathogenesis of Shwasa] The aggravated vayu along with vitiated kapha obstructs the channels (of prana, udaka and annavaha) and spreads throughout the body and produces shwasa.
english translation
yadA srotAMsi saMrudhya mArutaH kaphapUrvakaH । viSvagvrajati saMruddhastadA zvAsAnkaroti saH ॥45॥
hk transliteration by Sanscript