Theophylact of Ohrid
Catena Aurea · Markusevangelium 14
And as they did eat, Jesus took bread, and blessed, and brake it, and gave to them, and said, Take, eat: this is my body. And he took the cup, and when he had given thanks, he gave it to them: and they all drank of it. And he said unto them, This is my blood of the new testament, which is shed for many. Verily I say unto you, I will drink no more of the fruit of the vine, until that day that I drink it new in the kingdom of God.
As if He had said, I will not drink wine until the resurrection; for He calls His resurrection the kingdom, as He then reigned over death. But after His resurrection He ate and drank with His disciples, shewing that it was He Himself who had suffered. But He drank it new, that is, in a new and strange manner, for He had not a body subject to suffering, and requiring food, but immortal and incorruptible. We may also understand it in this way. The vine is the Lord Himself, by the offspring1 of the vine is meant mysteries, and the secret understanding, which He Himself begets2, who teaches man knowledge. But in the kingdom of God, that is, in the world to come, He will drink with His disciples mysteries and knowledge, teaching us new things, and revealing what He now hides.