that does not have embankments surrounding it. Since there are no partitions, it appears like an ocean or a river. That incident involving Rabbi Abbahu occurred in a place that has embankments and looks like a vessel. Therefore, the Sages did not prohibit it.

After citing what Rabbi Zeira related with regard to Rabbi Abbahu, the Gemara cites that Rabbi Zeira said: I saw that Rabbi Abbahu, while he was bathing, placed his hands over his genitals for the sake of modesty, and I do not know whether he touched them or did not touch them. The Gemara questions Rabbi Zeira’s uncertainty. It is obvious that he did not touch his genitals, as it was taught in a baraita: Rabbi Eliezer says: One who holds his penis and urinates it is as if he were bringing a flood to the world. He is liable to become aroused by that contact and that is an extremely severe transgression, comparable to the transgressions violated in the generation of the flood.

Abaye said: Nevertheless, no proof can be cited from that baraita. Perhaps the Sages rendered the legal status of this situation like that of a military unit, as we learned in a mishna: A military unit that entered a city, if it entered during peacetime, after the soldiers leave, the open barrels of wine are prohibited and the wine in them may not be drunk due to suspicion that the gentile soldiers may have poured this wine as a libation for idolatry. The sealed barrels are permitted. However, if the unit entered in wartime, both are permitted because in wartime there is no respite to pour wine for idolatry, and one can be certain that the soldiers did not do so. Apparently, since they are afraid, they do not pour libations. Here too, in the case of bathing, since he is afraid, he will not come to have impure thoughts. The Gemara asks: And what fear is there here that would prevent one bathing from having impure thoughts? The Gemara answers: Fear of the river. Since he needs to be careful that the water does not wash him away, he is too distracted to think of other matters.

The Gemara questions the story itself: And is that so? Is it permitted under any circumstances to cover one’s genitals while bathing? Didn’t Rabbi Abba say that Rav Huna said that Rav said: Anyone who places his hands over his genitals is as if he denies the covenant of our father Abraham? It appears as if he is covering himself to obscure the fact that he is circumcised. The Gemara answers: This is not difficult, as there is room to distinguish and say that this, the case where it is prohibited to cover oneself, is when he is descending into the river and there are no people facing him and he need not be concerned with modesty. In that case covering oneself is prohibited as he appears to be renouncing the covenant of Abraham. That, the case where, in certain circumstances, this prohibition does not apply, is when he is emerging from the river. When he emerges, he is facing the people on the riverbank and it is then permitted to cover himself in the interest of modesty, as that which Rava would do. He would bend over when he was naked. Rabbi Zeira would stand upright, in accordance with Rav’s statement that it is prohibited to appear to be renouncing the covenant of Abraham. When the Sages of the school of Rav Ashi descended into the river they stood upright. When they emerged from the river they bent over.

Speaking of bathing and its halakhot, the Gemara relates: Rabbi Zeira was avoiding being seen by his teacher, Rav Yehuda, as Rabbi Zeira sought to ascend to Eretz Yisrael and his teacher disapproved. As Rav Yehuda said: Anyone who ascends from Babylonia to Eretz Yisrael transgresses a positive commandment, as it is stated: “They shall be taken to Babylonia and there they shall remain until the day that I recall them, said the Lord” (Jeremiah 27:22). Based on that verse, Rav Yehuda held that since the Babylonian exile was by divine decree, permission to leave Babylonia for Eretz Yisrael could only be granted by God. Rabbi Zeira did not want to discuss his desire to emigrate with Rav Yehuda, so that he would not be forced to explicitly disobey him. Nevertheless, he said: I will go and hear something from him and then I will leave. He went and found Rav Yehuda standing in the bathhouse and telling his servant: Bring me natron [neter] with which to wash, bring me a comb, open your mouths and let out air, and drink from the water of the bathhouse. Rabbi Zeira said: If I had come only to hear this matter from Rav Yehuda, it would suffice for me.

The Gemara analyzes the lessons learned from this story. Granted, when Rav Yehuda said: Bring me natron, bring me a comb, he was teaching us that mundane matters are permitted to be spoken in the bathhouse, even in the sacred language. When he said: Open your mouths and let out air, that too is in accordance with that which Shmuel said, as Shmuel said: Heat produces heat. The hot air that one inhales causes him to sweat more quickly. However, drink the water of the bathhouse, what benefit is there in doing that? The Gemara answers: As it was taught in a baraita: One who ate and did not drink at all, what he ate becomes blood and that causes the onset of intestinal disease. One who ate and did not walk four cubits after eating, what he ate rots and that causes the onset of bad breath. One who needs to defecate and ate is similar to an oven that was lit on top of its ashes. When ashes from a previous fire are not swept out, and new logs are placed on top of the old ones, it inhibits the burning and dirties the oven, and that causes the onset of odor of the filth of perspiration in a person. As far as our matter is concerned, the baraita teaches: One who bathed in hot water and did not drink from it is like an oven that was lit from the outside and not lit from the inside. The lighting is ineffective and the oven does not heat properly. Rav Yehuda told his servants to drink the hot water while bathing so that they would be heated from the inside and the outside. The baraita continues: One who bathed in hot water and did not rinse afterward with cold water is like iron that was placed in the fire and not placed afterward in cold water, which leaves the iron soft. And one who bathed and did not smear himself with oil afterward is like water that was poured on top of a barrel, and not into it. The water spills outside the barrel.

MISHNA: In this mishna, the Sages discuss two vessels used for heating water. With regard to a mulyar, a bronze vessel into which coals are placed in an outer compartment and water is placed into an adjacent inner compartment, whose coals were swept, one may drink from it on Shabbat. With regard to an antikhi, which is a vessel with a different configuration, even if its coals were swept, one may not drink from it on Shabbat.

GEMARA: The Gemara asks: What are the circumstances of a swept mulyar? The Gemara answers: A mulyar is the vessel, explained in the Tosefta on our mishna, that has water on the inside and coals on the outside. With regard to the identity of an antikhi there are different opinions. Rabba said that it refers to a stove. A space is created in the wall of a stove and filled with water. Since the stove is very hot, it is prohibited to use this water. Rav Naḥman bar Yitzhak said: An antikhi is a cauldron, i.e., a vessel made from two cauldrons stacked one on top of the other with coals in the bottom one and water in the upper one. These two different opinions have halakhic implications. The one who says that it is prohibited to use a vessel composed of two cauldrons, all the more so it is prohibited to use the space inside of a stove. And the one who says that it is prohibited to use the space inside a stove, a vessel composed of two cauldrons, no, it is not prohibited. It was taught in a baraita in accordance with the opinion of Rav Naḥman: An antikhi, even if it was swept and covered with ashes, one may not drink from it on Shabbat because its copper heats it. The heating in an antikhi is by means of the coals beneath the water.

MISHNA: The Sages added to the laws of leaving food on a source of heat and cooking food on Shabbat: An urn that was emptied of its hot water on Shabbat, one may not place cold water into it so that the cold water will be heated. However, one may place cold water into an urn or into a cup that were emptied of their hot water in order to warm it but not in order to heat it.

GEMARA: The mishna seems to contradict itself. The first statement completely prohibits placing water into an urn, and later it was partially permitted. The Gemara asks: What is the mishna saying? Rav Adda bar Mattana said that it said the following: An urn that was emptied of its hot water, one may not put a small amount of water into it so that it will become very hot. However, one may put a large quantity of water into it in order to warm it. A large quantity of cold water will not be heated in those circumstances.