Śatapatha Brāhmaṇa ("of a hundred paths") 1.5.1.9

1.5.1.9

athārṣeyam pravṛṇīte | ṛṣibhyaścaivainametaddevebhyaśca nivedayatyayam mahāvīryo yo yajñam prāpaditi tasmādārṣeyam pravṛṇīte

He then chooses (Agni as) the ancestral (Hotri). He thus introduces him both to the (ancestral) rishis and to the gods (as if he were saying), 'he is of mighty strength who obtained the sacrifice!' for this reason he chooses (him as) the ancestral one.