Śatapatha Brāhmaṇa ("of a hundred paths") 1.3.1.2

1.3.1.2

atha pātrāṇi nirṇenijati | tairnirṇitya pariveviṣatyevaṃ vā eṣa devānāṃ yajño bhavati yacūtāni havīṃṣi kLptāvedisteṣāmetānyeva pātrāṇi yatsrucaḥ

They rinse the vessels, and having rinsed them, they serve up the food with them: in the same way is treated the sacrifice to the gods, that is to say, the cooked oblations and the prepared altar; and those vessels of theirs, the sacrificial spoons.