Verse 2.5.2.30

pratiparāṇīyodaiti pratiprasthātā | sammṛjantyagniṃ sammṛṣṭe'gnau tā ubhāvevottarāvāghārāvāghārayato'thādhvaryurevāśrāvya hotāram pravṛṇīte pravṛto hotottarasyai vederhotṛṣadana upaviśatyupaviśya prasauti tā ubhāveva prasūtau sruca ādāyātikrāmato'tikramyāśrāvyādhvaryurevāha samidho yajeti yaja yajeti caturthe-caturthe prayāje samānayamānau navabhiḥ prayājaiścarataḥ

Preview of English translation:

30. Having led her back (to her seat) the Pratiprasthatri returns (to his place by the side of the southern altar). They now trim the fire. When the fire has been trimmed, both (the Adhvaryu and Pratiprasthatri) make the second libation (of butter). Thereupon the Adhvaryu, having called (on the Agnidhra) for the 'Shraushat,' chooses the Hotri. The chosen Hotri then seats himself on the Hotri’s seat beside the northern altar; and having seated himself, he urges (the Adhvaryu and Pratiprasthatri) to proceed. Being thus urged to proceed, they both take up the spoons and step across (to the south side of the fires). After stepping across and calling for the 'Shraushat,' the Adhvaryu says (to the Hotri), “Pronounce the offering-prayer on the kindling-sticks!” and 'Pronounce the offering-prayer!' at each (subsequent fore-offering). Pouring (the butter in the spoons) together (into the juhu) at the fourth, they both proceed with the nine fore-offerings.

For a detailled translation, including proper diacritics and footnotes, go the full English translation.