Shatapatha Brahmana 9.5.1.31

9.5.1.31

dve agnerjuhoti | dvipādyajamāno yajamāno 'gniryāvānagniryāvatyasya mātrā tāvataivaitadyajñaṃ saṃsthāpayatīṣṭo yajño bhṛgubhiriṣṭo agnirāhutaḥ pipartu na iti

Two he offers of the fire-altar,--two-footed is the Sacrificer, and Agni is the Sacrificer: as great as Agni is, as great as is his measure, with so much he thus completes the sacrifice. [He offers them, with, Vâg. S. XVIII, 56, 57], 'Sacrifice hath been offered, up by the Bhrigus...;'--'May Agni who hath received sacrifice and oblation speed our offered meat!'