Avodah Zarah

AND [THE JUICE] DOES NOT BECOME YEN NESEK UNTIL IT DESCENDS INTO THE VAT. But we have learnt: Wine [becomes subject to the tithe] when it is skimmed!  — Raba said: There is no contradiction, because [this latter teaching] is R. Akiba's and [that of the Mishnah] is the Rabbis'. For it has been taught: [The liquid is considered to be] wine when it descends into the vat, whereas R. Akiba says, When it is skimmed. The question was asked: Does this mean skimming [of the wine] while it is in the vat or when it is in the cask? — Come and hear! We have learnt: [It is to be considered] wine when it is skimmed; and although he has skimmed it, he may draw some off from the upper trough and from the pipe and drink it.  Deduce from this that we mean the skimming while it is in the vat. Draw this conclusion. But R. Zebid learnt in the [collection of Baraithas] of the School of R. Oshaia:  [It is to be considered] wine when it descends into the vat and is skimmed; whereas R. Akiba says: When it is drawn into casks!  — That former [Baraitha]  must be also explained in the sense just given, vis.: [It is considered to be] wine when it descends into the vat and is skimmed; whereas R. Akiba says: When it is drawn into casks. But since our Mishnah teaches: IT DOES NOT BECOME YEN NESEK UNTIL IT DESCENDS INTO THE VAT, conclude that there are three Tannaim [offering different definitions]!  — No; it is different as regards yen nesek because the Rabbis take a strict view;