Mahabharat

siva.sh/mahabharat/vana-parva/203/19

परयत्ने कर्मणि बले य एकस तरिषु वर्तते उदान इति तं पराहुर अध्यात्मविदुषॊ जनाः ।। ३-२०३-१९ ।।

sanskrit

'That same air is present in the three elements of effort, exertion, and power. In this state, it is called the Udāna air by those learned in physical science.' ।। 3-203-19 ।।

english translation

parayatne karmaNi bale ya ekasa tariSu vartate udAna iti taM parAhura adhyAtmaviduSò janAH || 3-203-19 ||

hk transliteration by Sanscript