Śatapatha Brāhmaṇa ("of a hundred paths") 2.5.3.12

2.5.3.12

agnaye 'nubrūhīti | āgneyamājyabhāgaṃ sa sthālyai caturājyasyāvadāyātikrāmatyatikramyāśrāvyāhāgniṃ yajeti vaṣaṭkṛte juhoti

'Pronounce the invitatory prayer to Agni!' with a view to (offering) Agni's butter-portion. He then takes four 'cuttings' of butter from the pot and steps across (to the offering-place on the south side of the fire). Having stepped across and called for the (Âgnîdhra's) Sraushat, he says (to the Hotri), 'Pronounce the offering-prayer to Agni!' and pours out the oblation, as soon as the Vashat has been uttered.