Chandogya Upanishad 5.23

atha yām pañcamīṃ juhuyāt tāṃ juhuyāt udānāya svāheti udānas tṛpyati

'And he who offers the fifth oblation, should offer it to Udâna (out-breathing), saying Svâhâ. Then Udâna is satisfied,

udāne tṛpyati tvak tṛpyati tvaci tṛpyantyāṃ vāyus tṛpyati vāyau tṛpyaty ākāśas tṛpyati ākāśe tṛpyati yat kiṃca vāyuś cākāśaś cādhitiṣṭhatas tat tṛpyati tasyānu tṛptiṃ tṛpyati prajayā paśubhir annādyena tejasā brahmavarcaseneti

'If Udâna is satisfied, Vâyu (air) is satisfied, if Vâyu is satisfied, ether is satisfied, if ether is satisfied, whatever is under Vâyu and under the ether is satisfied. And through their satisfaction he (the sacrificer or eater) himself is satisfied with offspring, cattle, health, brightness, and Vedic splendour.