Avodah Zarah 75B

דצבתא ⁠— לנגבן, דכיתנא ⁠— מישנן, ואי אית בהו קיטרי ⁠— שרי להו.

With regard to those that are plaited from tzavta, one must cleanse them with ashes and water. With regard to those that are plaited from flax, one must leave them dormant. And if they have knots, one must undo them.

איתמר: עם הארץ שהושיט ידו לגת ונגע באשכולות, רבי ורבי חייא ⁠— חד אמר: אשכול וכל סביבותיו טמאין, וכל הגת כולה טהורה; וחד אמר: כל הגת כולה נמי טמאה.

§ The Talmud discusses another aspect of the purity of a winepress. It was stated: In the case of one who is unreliable with regard to ritual impurity [am ha’aretz] who reached his hand into the winepress and touched grape clusters that were lying in the wine, R' Yehuda HaNasi and R' Ḥiyya disagree. One says that the cluster he touched and all its surroundings are rendered impure, but the rest of the entire winepress is pure, and one says that the rest of the entire winepress is also rendered impure, as the entire winepress is considered connected due to the wine in it.

ולמאן דאמר: אשכול וכל סביבותיו טמאים, וכל הגת כולה טהורה, מאי שנא מהא דתנן: שרץ שנמצא ברחים אינו מטמא אלא מקום מגעו, ואם היה משקין מהלך ⁠— הכל טמא?

The Talmud asks: And according to the one who says that the cluster and all its surroundings are impure but the rest of the entire winepress is pure, in what way is this case different from that which we learned in a Mishnah (Teharot 9:8): The carcass of a creeping animal that was found in an oil press transmits impurity to the place it touched alone, but if there was liquid flowing in the mill, it is all rendered impure? Why is it not the halakha in the case of the winepress as well that the entire winepress is impure due to the liquid in it?