Śatapatha Brāhmaṇa ("of a hundred paths") 9.2.3.30

9.2.3.30

athainamabhijuhoti | etadvā enaṃ devā īyivāṃsamupariṣṭādannenāprīṇannetayāhutyā tathaivainamayametadīyivāṃsamupariṣṭādannena prīṇātyetayāhutyā kṛṣṇāyai śuklavatsāyai payasā rātrirvai kṛṣṇā śuklavatsā tasyā asāvādityo vatsaḥ svenaivainametadbhāgena svena rasena prīṇātyupari dhāryamāṇa upari hi sa yametatprīṇāti dohanena dohanena hi payaḥ pradīyate

He then makes offering on that (firebrand);--for now that he (Agni) had arrived the gods thereupon gratified him with food, this oblation; and in like manner does this (Sacrificer), now that he (Agni) has arrived, thereupon gratify him with food, this oblation. With milk from a black (cow) which has a white calf (he makes offering); the black (cow) with a white calf is the night, and her calf is yonder sun: he thus regales him with his own share, with his own relish. On it (the firebrand, he offers) while it is held above (the naturally-perforated brick); for above (everything) is he whom he thereby gratifies. By means of the milk-pail (he offers), for with the milk-pail milk is given away.