Śatapatha Brāhmaṇa ("of a hundred paths") 1.1.4.22

1.1.4.22

athāpavinakti | vāyurvo vivinaktvityayaṃ vai vāyuryo 'yam pavata eṣa vā idaṃ sarvaṃ vivinakti yadidaṃ kiṃca vivicyate tadenāneṣa evaitad vivinaktisa yadaita etatprāpnuvanti yatrainān adhyapavinakti

He then separates (the husked grains from the unhusked), with the text (Vâg. S. I, 16 f): 'May the wind separate you!' For it is that wind (which is produced by the winnowing) which here purifies (or blows, pavate); and it is the wind that separates everything here (on earth) that undergoes separation: therefore it also separates here those (two kinds of grain) from each other. Now when they are undergoing this process, and whilst he is separating (the husked, so as to drop them into a pot),--