Shatapatha Brahmana 3.6.1.11

3.6.1.11

sa yavānāvapati | yavo 'si yavayāsmaddveṣo yavayārātīriti nātra tirohitamivāstyatha prokṣatyeko vai prokṣaṇasya bandhurmedhyāmevaitatkaroti

He throws the barley-corns into it, with, 'Thou art barley (yava): keep thou (yavaya) from us the haters, keep from us the enemies!' In this there is nothing obscure. He then besprinkles (the post);--the significance of the sprinkling is one and the same: he thereby renders it sacrificially pure.