Shatapatha Brahmana 1.1.3.10

1.1.3.10

prokṣitā stheti | tadetābhyo nihnute 'tha haviḥ prokṣatyeko vai prokṣaṇasya bandhurmedhyamevaitatkaroti 1.1.3[.1]1 sa prokṣati agnaye tvā juṣṭam prokṣāmīti tadyasyai devatāyai havirbhavati tasyai medhyaṃ karotyevameva yathāpūrvaṃ havīṃṣi prokṣya

And further (Vâg. S. I, 13 d): 'Consecrated by sprinkling are ye!' With these words he makes amends to them. He then sprinkles the (first) oblation. One and the same meaning applies to the (whole process of) sprinkling, viz. he thereby makes sacrificially pure that (which he sprinkles).