Śatapatha Brāhmaṇa ("of a hundred paths") 14.2.2.32

14.2.2.32

svāhā pūṣṇe śarasa iti ayam vai pūṣā yo'yam pavata eṣa hīdaṃ sarvam puṣyatyeṣa u prāṇaḥ prāṇamevāsminnetaddadhāti tasmādāha svāhā pūṣṇe śarasa ityavaraṃ svāhākāraṃ karoti parāṃ devatāmasāveva bandhurhutvā madhyame paridhāupaśrayati

With (Vâg. S. XXXVIII, 15), 'Hail to Pûshan, to the cream!'--Pûshan, doubtless, is he who blows here, for he (the wind) supports (push) everything here; and the breath also is that (wind): it is breath he thus bestows upon him, whence he says, 'Hail to Pûshan, to the cream!' The call of 'hail!' he places first, and the deity last: the significance of this is the same as before. Having offered (by means of the first piece) he leans it against the middle enclosing-stick (paridhi).