The Canons of the Council in Trullo; Often Called The Quinisext Council 28Canon XXVIII.

Since we understand that in several churches grapes are brought to the altar, according to a custom which has long prevailed, and the ministers joined this with the unbloody sacrifice of the oblation, and distributed both to the people at the same time, we decree that no priest shall do this for the future, but shall administer the oblation alone to the people for the quickening of their souls and for the remission of their sins. But with regard to the offering of grapes as first fruits, the priests may bless them apart [from the offering of the oblation] and distribute them to such as seek them as an act of thanksgiving to him who is the Giver of the fruits by which our bodies are increased and fed according to his divine decree. And if any cleric shall violate this decree let him be deposed.