Shatapatha Brahmana 2.2.3.25

2.2.3.25

tasmai kam punarādheyamādadhīta | evaṃ haivāgneḥ priyaṃ dhāmopagacati so 'smā ubhayāni rūpāṇi pratiniḥsṛjati yāni ca grāmyāṇi yāni cāraṇyāni tasminnetānyubhayāni rūpāṇi dṛśyante paramatā vai sā spṛhayantyu hāsmai tathā puṣyati lokyamvevāpi

He recites, '[The divine Barhis] may accept (the offering) for Agni's abundant obtainment of abundant gift! Vaughak!'--'[The divine Narâsamsa] may accept (the offering) for abundant obtainment, in Agni, of abundant gift! Vaughak!'--'The divine Agni Svishtakrit....' this third (after-offering) is already in itself of the nature of Agni; and thus he makes the after-offerings relate to Agni.