Śatapatha Brāhmaṇa ("of a hundred paths") 2.6.1.28

2.6.1.28

athāha pitṛbhyo barhiṣadbhyo 'nubrūhīti | sa upastṛṇīta ājyamathāsāṃ dhānānāmavadyati sa tenaiva saha manthasya tena saha puroḍāśasya tatsakṛdavadadhātyathopariṣṭādvirājyasyābhighārayati pratyanaktyavadānāni nātikrāmatīta evopotthāyāśrāvyāha pitṝnbarhiṣado yajeti vaṣaṭkṛte juhoti

Thereupon he says, 'Pronounce the invitatory prayer to the fathers, seated on the barhis!' He then makes an under-layer of butter, takes a 'cutting' from (the north part of) the parched grain, and together therewith some of the porridge and the cake; puts down all this at the same time (in the guhû); makes two sprinklings of butter thereon, and re-anoints (the places of) the cuttings. He does not walk across; but having stepped up (to the fire) on the same side and called for the 'Sraushat,' he says, 'Pronounce the offering-prayer to the fathers, seated on the barhis!' and pours out the oblation as soon as the Vashat has been uttered.