Śatapatha Brāhmaṇa ("of a hundred paths") 1.2.4.13

1.2.4.13

sa yo 'sāvagnīduttarataḥ paryeti | agnirevaiṣa nidānena tānadhvaryureveta upasaṃruṇaddhi tāntsaṃrudhyaibhiśca lokairabhinidadhāti yadu cemāṃllokānati caturtha tataḥ punarna saṃjihate tasmādapyetarhyasurā na saṃjihate yena hyevaināndevā avābādhanta tenaivainānapyetarhi brahmaṇā yajñe 'vabādhante

The Âgnîdhra goes round to the north, for he is virtually the same person as Agni himself. The Adhvaryu then shuts them in from here,; and whilst shutting them in, he puts them down by means of these (three) worlds; and from what fourth world there is beyond these (three) they do not rise again. Thus now also they do not rise again, for by the same means by which the gods kept them off, the priests now also keep them off during the sacrifice.