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