(Mishnah): If a Jew sells his wine to an idolater, if he set a price before measuring it, the payment is permitted. If he measured before setting the price, the payment is prohibited (as it had already become prohibited before the payment for it was given).

If the Jew took the funnel and measured wine into the container of the idolater (that already contained some Yayin Nesech) and used the funnel to pour wine into the container of a Jew, if the funnel had an Ikvas Yayin (the Gemara will explain this term), the wine is prohibited.

If a Jew pours wine from a vessel to another vessel (that is being held by an idolater), the wine remaining in the first vessel is permitted; the wine in the second vessel is prohibited.

(Gemara) (R. Ba/ Rav Huna citing Rav): If a person made an acquisition of meshichah on a leather bottle of wine and the bottle split open in his hand, thereby spilling the wine, he would not be responsible for the wine since he did not intend to acquire the bottle.

R.Yosi bei R. Bun: That does not need to be taught; rather, Rav is teaching that if the seller took the buyer into his shop and the wine became spilled, the buyer is not responsible for it - the buyer only entered the shop in order to fix a price before anyone else would buy it, but he did not intend to acquire until the price was fixed.

Question: Although if he did meshichah before the price was fixed, there is no acquisition, but if the seller later agrees to sell it at the lowest market price, does the buyer then become responsible or do we say that since at the time of the meshichah he hadn't yet decided, he also cannot acquire it now?

Answer (R. Chagai citing R. Yosi): Our Mishnah teaches us that he did not acquire it if they only fixed a price after the meshichah...

If a Jew sells his wine to an idolater, if he set a price before measuring it, the payment is permitted. If he measured before setting the price, the payment is prohibited (as it had already become prohibited before the payment for it was given).

Conclusion of answer: If you say that he acquires it according to the lowest price, even in the latter case the money should be permitted. Rather, a decision is needed in order to become responsible for it.

Question: What is an Ikvas Yayin (mentioned in the Mishnah)? That which is dirty with wine, as the pasuk states (Hoshea 6:8), "(Gilead is a city of those that work iniquity), it is dirtied with blood."

It is certain according to all opinions, that if a Jew holds the spout (to direct the wine into another vessel) and the gentile pours, it is prohibited.

If a gentile holds the spout and the Jew pours, R. Asi prohibits the wine and R. Ami permits it.

If a gentile holds the mouth of the bottle in which the Jew pours the wine, R. Yirmiyah said in the name of R. Zeira that it is a dispute.

Question (R. Mana to R. Yasi): Which dispute?

Answer: Of R. Asi and R. Ami.

If a Jew holds the mouth of the bottle in which the gentile pours, the Rabbis suggested that all would agree that the wine is permitted.

(R. Shmuel): All agree that it is prohibited here, as sometimes the Jew might weaken his grip on the bottle and all of the pouring from the bottle would therefore come from the movement of the gentile, thereby prohibiting the wine.

If a gentile tips the bottle thereby moving the wine inside from above to below, it is not prohibited because that is not the normal way of performing a libation.