Śatapatha Brāhmaṇa ("of a hundred paths") 2.5.3.7

2.5.3.7

agnaye 'nubrrūhīti | āgneyamājyabhāgaṃ sa dakṣiṇasyaudanasya sarpirāsecanāccaturājyasyāvadāyātikrāmatyatikramyāśrāvyāhāgniṃ yajeti vaṣaṭkṛte juhoti

'Pronounce the invitatory prayer to Agni!' with reference to Agni's butter-portion. He then takes four 'cuttings' of butter from the hollow of the southern pap, and steps over (to the south side of the fire). Having stepped over, 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.