Śatapatha Brāhmaṇa ("of a hundred paths") 4.3.5.21

4.3.5.21

atha punaḥ prapadya | āgrayaṇamādatta udīcīnadaśam pavitraṃ vitanvanti praskandayatyadhvaryurāgrayaṇasyapratiprasthātā sampragṛhṇāti saṃsravāvānayatyunnetā camasena vodañcanena vā

Thereupon he again enters (the Havirdhâna) and draws the Âgrayana graha. They spread (over the Pûtabhrit) a straining-cloth with the fringe towards the north. The Adhvaryu pours out (the juice) of the Âgrayana; the Pratiprasthâtri holds out (and pours in) the two residues (of the Âditya graha); the Unnetri adds thereto (some juice from the Âdhavanîya) by means of a kamasa cup or a dipping-vessel (udañkana).