Śatapatha Brāhmaṇa ("of a hundred paths") 14.2.2.36

14.2.2.36

svāhā dyāvāpṛthivībhyāmiti prāṇodānau vai dyāvāpṛthivīprāṇodānāvevāsminnetaddadhāti hutvā madhyame parid>āupaśrayati

'Hail to Heaven and Earth!'--heaven and earth being the out (and in)-breathing and the up-breathing, it is the out and up-breathing he thus bestows upon him. Having offered (with the fifth stick) he leans it against the middle enclosing-stick.