Śatapatha Brāhmaṇa ("of a hundred paths") 1.3.3.2

1.3.3.2

atha vedim prokṣati | vedirasi barhiṣe tvā juṣṭām prokṣāmi tanmedhyāmevaitadbarhiṣe karoti

He then sprinkles he altar, with the text (Vâg. S. II, 1), 'Thou art the altar; I sprinkle thee, agreeable to the barhis (sacrificial-grass covering)!' He thereby makes it sacrificially pure for the grass covering.