Śatapatha Brāhmaṇa ("of a hundred paths") 1.7.3.22

1.7.3.22

eṣa vai sa yajñaḥ | yena taddevā divamupodakrāmanneṣa āhavanīyo 'tha ya ihāhīyata sa gārhapatyastasmādetaṃ gārhapatyātprāñcamuddharanti

That (fire)---to wit, the Âhavanîya--is, indeed, that sacrifice by which the gods then ascended to heaven; and that (other fire) which was left behind here, is the Gârhapatya: hence they take out the former from the Gârhapatya, (so as to be) before (east) of it.