Śatapatha Brāhmaṇa ("of a hundred paths") 1.5.2.1

1.5.2.1

agnirhotā vettvagnerhotramiti agniridaṃ hotā vettvityevaitadāhāgnerhotramiti tasyo hi hotraṃ vettu prāvitramiti yajño vai prāvitraṃ vettu yajñamityevaitadāha sādhu te yajamāna devateti sādhu te yajamāna devatā yasya te 'gnirhotetyevaitadāha ghṛtavatīmadhvaryo srucamāsyasveti tadadhvaryu prasauti sa yadekāmivāha

[The Hotri continues], 'May Agni, the priest (hotri), know (undertake) Agni's priestly duty (hautram),'--thereby he says 'may Agni, as Hotri, know this!' 'Agni's priestly duty' he says, because it is his duty that he must know;--'that means of salvation,'--the means of salvation, assuredly, is the sacrifice: 'may he know the sacrifice' is what he thereby says.--'Favourable to thee, O Sacrificer, is the deity!' by this he says 'favourable is the deity to thee, O Sacrificer, whose Hotri is Agni!'--'Take up the spoon, O Adhvaryu, full of butter!' thereby he urges on the Adhvaryu. The reason why he mentions one (spoon) only (is this).