Chandogya Upanishad
tad yad bhaktaṃ prathamam āgacchet taddhomīyam sa yāṃ prathamām āhutiṃ juhuyāt tāṃ juhuyāt prāṇāya svāheti prāṇas tṛpyati
'Therefore the first food which a man may take, is in the place of Homa. And he who offers that first oblation, should offer it to Prâna (up-breathing), saying Svâhâ. Then Prâna (up-breathing) is satisfied,
prāṇe tṛpyati cakṣus tṛpyati cakṣuṣi tṛpyaty ādityas tṛpyati āditye tṛpyati dyaus tṛpyati divi tṛpyantyāṃ yat kiṃca dyauś cādityaś cādhitiṣṭhatas tat tṛpyati tasyānu tṛptiṃ tṛpyati prajayā paśubhir annādyena tejasā brahmavarcaseneti
'If Prâna is satisfied, the eye is satisfied, if the eye is satisfied, the sun is satisfied, if the sun is satisfied, heaven is satisfied, if heaven is satisfied, whatever is under heaven and under the sun is satisfied. And through their satisfaction he (the sacrificer or eater) himself is satisfied with offspring, cattle, health, brightness, and Vedic splendour.