Shatapatha Brahmana 4.3.5.9

4.3.5.9

samprapadyante | adhvaryuśca yajamānaścāgnīdhraśca pratiprasthātā connetātha yo 'nyaḥ paricaro bhavatyubhe dvāre apidadhati rakṣobhyo hyabibhayurathādhvaryurādityasthālīṃ cādityapātraṃ cādatte sa uparyupari pūtabhṛtaṃ vigṛhṇāti nedvyavaścotaditi

They enter (the Havirdhâna) together,--the Adhvaryu, Sacrificer, Âgnîdhra, Pratiprasthâtri, Unnetri, and whatever other attendant (of the Adhvaryu) there is. They close both doors,--for they (the Âdityas) were afraid of the Rakshas. He (the Adhvaryu) takes up the Âditya-sthâlî and Âditya-pâtra, and holds them close over the Pûtabhrit, 'lest (any Soma juice) should be spilt.'