Charak Samhita
समानं शमयेच्चैव त्रिधा व्यानं तु योजयेत् । प्राणो रक्ष्यश्चतुर्भ्योऽपि स्थाने ह्यस्य स्थितिर्ध्रुवा ॥२२०॥
The samana should be alleviated and the vyana should be treated by all the three methods. Even more carefully than the other four types of vata, the prana should be maintained, because life depends on the proper maintenance of it in its habitat.
english translation
samAnaM zamayeccaiva tridhA vyAnaM tu yojayet । prANo rakSyazcaturbhyo'pi sthAne hyasya sthitirdhruvA ॥220॥
hk transliteration by Sanscript