1) THE PROOF THAT A NOCHRI MAY MAKE A KINYAN THROUGH AN ACT OF CHAZAKAH
QUESTION: The Gemara asserts that Nochri captors acquire ownership of the Eved Kena'ani whom they capture. The Gemara proves that a Nochri can acquire another Nochri as his Eved through a Chazakah (performing an act that shows his ownership). The Gemara derives this through three stages.
In its first stage, the Gemara proves from a Kal va'Chomer that a Nochri can acquire the rights to the labor ("Ma'aseh Yadav") of his fellow Nochri (although he cannot acquire the actual body of the person): if a Nochri can own the "Ma'aseh Yadav" of a Jew (as the Torah states in Vayikra 25:47), certainly he can own the "Ma'aseh Yadav" of a Nochri.
In its second stage, the Gemara proves from a verse that a Nochri can make a Kinyan through an act of Chazakah and does not need to give a monetary payment in order to make a Kinyan: the verses (Bamidbar 21:23, 21:26, Shoftim 11:13) show that Sichon's conquest (through Chazakah) of parts of the lands of Amon and Moav enabled Yisrael to take those lands.
In its third stage, the Gemara proves that an act of Chazakah not only enables a Nochri to acquire land or another Nochri, it enables a Nochri to acquire a Yisrael as well: the verse, "... he took captives from [Yisrael]" (Bamidbar 21:1), shows that the Canaanite king of Arad acquired slaves from Yisrael by capturing them (see Rashi on the verse).
Why is it necessary for the Gemara to mention the first two proofs? The Gemara should immediately cite the verse, "he took captives...," which clearly proves that a Nochri can acquire an Eved Kena'ani of a Jew through a Chazakah!
ANSWER: If not for the verse which mentions Sichon's conquest of the lands of Amon and Moav, the verse of "he took captives..." would prove nothing, because no act of acquisition is stated explicitly in that verse. Only after the Gemara shows that the verse of Sichon's conquest proves that a Nochri can make a Kinyan through an act of Chazakah can the Gemara prove that the verse of "he took captives..." refers to an act of acquisition through Chazakah as well.
Why, then, is the first proof (the Kal va'Chomer) necessary? It should suffice to cite the proof which describes the conquest of Sichon, which shows that a Nochri can make a Kinyan through an act of Chazakah, and the second proof which shows that Chazakah is also effective in acquiring an Eved.
The answer is that without the Derashah of "me'Hem," one would have assumed that a Nochri can acquire even the body of another Nochri. The Derashah of "me'Hem" is needed to show that a Nochri cannot own another Nochri's body. The Gemara then derives from the Kal va'Chomer that he can at least own another Nochri for his "Ma'aseh Yadav." (See TOSFOS, DH Dichtiv, and TOSFOS HA'ROSH.)
2) SICHON'S KINYAN THROUGH AN ACT OF CHAZAKAH
QUESTION: The Gemara asserts that Nochri captors acquire ownership of the Eved Kena'ani whom they capture. The Gemara proves that a Nochri can acquire another Nochri as his Eved through a Chazakah (performing an act that shows his ownership). (See previous Insight.) The Gemara proves that a Nochri can make a Kinyan through an act of Chazakah and his Kinyan does not require a monetary payment from the verses (Bamidbar 21:23, 21:26, Shoftim 11:13) which discuss Sichon's conquest (through Chazakah) of parts of the lands of Amon and Moav.
How does the Gemara prove that a Nochri has the ability to acquire an Eved from the verse of Sichon? That verse refers to the lands of Amon and Moav, and not to the people of Amon and Moav!
ANSWERS:
(a) TOSFOS (DH Amon) explains that the Gemara assumes that just as Sichon conquered the lands of Amon and Moav and acquired them through Chazakah, he also captured as slaves the people of Amon and Moav and acquired them through Chazakah.
(b) The RASHBA explains that the only point the Gemara wants to prove at this stage is that it is possible for a Nochri to make a Kinyan Chazakah. Once the Gemara proves that a Nochri can make a Kinyan through an act of Chazakah, it assumes that he may apply this power of acquisition to anything. This also seems to be the intention of RASHI (DH b'Chazakah).
3) THE ACT OF A CHAZAKAH
OPINIONS: The Gemara discusses the acquisition of an Eved or land through an act of Chazakah. To what type of act does the Gemara refer?
(a) RASHI and the RAN understand that "Chazakah" here refers to its usual meaning, an act that shows ownership. With regard to the purchase of land, it refers to an act of guarding the land from trespassers as an owner would do. With regard to the purchase of an Eved, it refers to an act of using the Eved for personal service (such as dressing and bathing the new owner) as an owner would do.
(b) TOSFOS and the RASHBA disagree with Rashi and the Ran. They explain that this type of Kinyan would not suffice to effect a transfer of ownership. Instead, they explain that "Chazakah" here refers to a new type of Kinyan: conquest through war ("Kivush Milchamah"). Conquering someone or something is a powerful enough act in itself to transfer ownership from the conquered to the conqueror, and the conqueror becomes the new owner.
(According to Rashi and the Ran, a Nochri can purchase an Eved and acquire ownership through any type of Chazakah, provided that the owner agrees to transfer his ownership. In contrast, according to Tosfos and the Rashba, the only way a Nochri can acquire an Eved is in the case of the Mishnah -- where the Eved was captured.)
According to Tosfos and the Rashba, does a Nochri acquire ownership of an Eved only through the Chazakah of conquest of war, or can he acquire an Eved through capturing him in other ways, such as kidnapping him?
The CHAZON ISH (147:11) writes that any act which the government permits is considered "Kivush," conquest. The ruling powers of most countries of Nochrim permit acquiring things through conquest and military victory. Theft, on the other hand, is an act of taking without permission, and thus an act of capturing an Eved through theft would not be considered a valid Kinyan.
4) A SLAVE WHO ESCAPES FROM CAPTIVITY
QUESTION: Rav Shaman bar Aba says in the name of Rebbi Yochanan that an Eved who escapes from prison acquires himself and goes free. Assuming that his captors (who imprisoned him) are his new owners (as the Gemara earlier establishes), how does the slave acquire his ownership (and his freedom) from them by escaping from captivity?
ANSWERS:
(a) The captors presumably despaired ("Ye'ush") of finding the Eved and getting him back. Consequently, the Eved acquires himself after his owners' Ye'ush.
(b) The RASHBA explains (according to his own reasoning earlier; see previous Insight) that the captors acquired the Eved through the mere act of capture and conquest. Hence, by freeing himself from that conquest or, in other words, by performing a "counter-conquest," the Eved is able to acquire himself. Therefore, the "battle for freedom" that the Eved undertakes (and in which he is victorious) is considered a valid act of Chazakah to acquire himself.
5) GIVING A "GET SHICHRUR" TO A SLAVE WHO IS ALREADY FREE
QUESTION: Rav Shaman bar Aba says in the name of Rebbi Yochanan that an Eved who escapes from prison acquires himself and goes free. Moreover, Beis Din forces his master to write for him a Get Shichrur.
If the Eved goes free as a result of his act of escaping from prison, why is it necessary for his master to give him a Get Shichrur?
ANSWER: The state of being an Eved Kena'ani involves two elements. The first element is the monetary ownership of the Eved. An Eved does not have monetary ownership of himself; he is the possession of his master. The second aspect is his status with regard to Isurim and Mitzvos. He is obligated to fulfill certain Mitzvos (like a woman), and yet he is prohibited from marrying a Jewess. With regard to both the status of his monetary ownership and the status of his Isurim he is considered in the domain of his master, since both of these elements are the results of the acquisition that his owner made on him.
Rebbi Yochanan maintains that "Ye'ush" (when the owner despairs of getting his Eved back) frees the Eved only from the monetary domain of his master. Freedom from the status of an Eved with regard to Isurim is obtained only through a Get Shichrur. This seems to be the intent of RASHI who writes that the Eved, when he escapes, goes free "from further working for his master" (DH Yatza l'Cherus), and that the master must give a Get Shichrur to the Eved "in order to permit him to marry a Jewess" (DH v'Kosev Lo Get).
Shmuel (later in the Gemara) argues and maintains that the act of Hefker makes the Eved completely free and he does not need a Get Shichrur.
This concept, that the master of an Eved Kena'ani owns the Eved with regard to two different matters, monetary and Isur, answers another question in the Sugya. The Gemara later relates an incident involving a Shifchah Kena'anis with whom unscrupulous men were performing immoral acts. Abaye declared that if not for the prohibition against freeing an Eved (or Shifchah) Kena'ani, he would force the owner to free her so that she could marry a Jew who would watch over her.
Abaye's words, however, seem to contradict the Gemara earlier, in which Rebbi Yochanan states that Beis Din forces a master to free his Eved who escaped from prison. If, as Abaye says, freeing an Eved Kena'ani is prohibited, why does Rebbi Yochanan require a master to free his Eved who escaped from prison?
The answer is that the prohibition against freeing an Eved is based on the verse, "You will work with them forever" (Vayikra 25:46), as the Gemara says (38b). In the case of the Eved who escaped from prison, the Eved was no longer in the domain of the master with regard to his monetary ownership (since the master already despaired, with "Ye'ush," of ever getting him back). The only element of ownership that the original owner still retains is the Isurim of the Eved. Since the ownership of the Eved with regard to his Isurim does not entitle the original owner to make the Eved work for him, the requirement that "you will work with them forever" does not apply. Therefore, the master may free him and does not transgress the prohibition. (See MINCHAS CHINUCH #347, based on TOSFOS DH Kol.)

38b----------------------------------------38b

6) HALACHAH: SUSPENDING A PROHIBITION IN ORDER TO PERFORM A MITZVAH
OPINIONS: The Gemara (38a) relates an incident involving a Shifchah Kena'anis with whom unscrupulous men were performing immoral acts. Abaye declared that if not for the prohibition against freeing an Eved (or Shifchah) Kena'ani, he would force the owner to free her so that she could marry a Jew who would watch over her. The Gemara here questions Abaye's ruling. Another incident occurred in which a maidservant who was half-free and half-Shifchah (that is, she was owned in partnership by two owners, and one of them freed his share in her) was involved in immoral acts, and the Rabanan forced her owner to free her in order to prevent further sinful acts from being done with her. The ruling of the Rabanan in that case clearly contradicts the ruling of Abaye.
The Gemara answers that in Abaye's case, there was another possible option, besides freeing her, which would have put an end to the sinful acts being done with her. Since she was a full Shifchah, her owner could marry her off to an Eved. In the case of the half-Shifchah, though, she could not marry an Eved (because of the part of her that was half-free), and therefore the Rabanan had no choice but to force her master to free her.
The Gemara records another incident in which the Rabanan permitted an Eved Kena'ani to be freed. Rebbi Eliezer freed his Eved in order to obtain a tenth Jewish man for a Minyan. The Gemara says that in order to perform a Mitzvah (prayer with a Minyan), freeing an Eved is permitted.
Does this imply that one is permitted to transgress a prohibition (or at least a prohibition derived from a positive commandment) in order to fulfill a Mitzvah?
ANSWERS:
(a) The RITVA proves from here that the prohibition against freeing an Eved Kena'ani is only an Isur d'Rabanan, which the Rabanan permitted under certain circumstances (such as to perform a Mitzvah d'Oraisa, and to prevent severe Isurim from being transgressed). The Ritva asserts that by no means may a Torah prohibition be transgressed in order to perform a Mitzvah.
(b) The RAMBAN and other Rishonim explain that the prohibition against freeing an Eved Kena'ani is similar to the prohibition of "Lo Sechanem" -- "Do not show them (Nochrim) favor" (Devarim 7:2), which the Gemara (Avodah Zarah 20a) interprets as a prohibition against giving a gift to a Nochri. Freeing an Eved is considered giving a gift to him.
Since the prohibition against freeing an Eved is based on the prohibition against giving a gift to a Nochri, there are grounds to permit the owner to free his Eved, depending on his intention. If the master's intention is to do a favor for his Eved, freeing him is considered like giving him a present (and is forbidden). If the master wants to free his Eved for his (the master's) own purposes, such as to help himself or others fulfill a Mitzvah, the beneficiary is considered to be the master and not the Eved.
(c) TOSFOS and the RASHBA explain that freeing an Eved for the sake of performing a Mitzvah is permitted only when that Mitzvah is a "Mitzvah Rabah," a great or special Mitzvah (such as preventing sins of immorality, enabling people to pray with a Minyan, or, as the Gemara mentions in Bava Basra 13a, to enable the fulfillment of the Mitzvah of "Peru u'Revu").
7) AGADAH: THREE SINS FOR WHICH ONE LOSES HIS WEALTH
QUESTION: The Gemara teaches that as a result of three misdeeds, people lose their wealth: they release their slaves to freedom, they inspect their property on Shabbos, and they conduct their Shabbos meals during the Rav's lecture in the Beis ha'Midrash.
Why are these three sins in particular punished by a loss of one's wealth?
ANSWERS:
(a) The MAHARSHA explains how losing one's wealth is an appropriate, measure-for-measure punishment for each of these three sins.
1. Freeing one's Eved. When a person is blessed with material possessions, he must be careful to act properly with them, in accordance with Hash-m's will. If he performs transgressions with them (in this case, by freeing his Eved), he loses the right to the possessions which Hash-m gave him and he causes those possessions to be taken away from him.
2. Inspecting one's property on Shabbos. The Gemara in Shabbos (150b) implies that one who frees his mind from business matters on Shabbos will be blessed with riches. Here, the Gemara expresses the converse: by thinking about one's business matters on Shabbos, one loses his wealth.
3. Conducting one's Shabbos meal during the Rav's lecture in the Beis ha'Midrash. By not attending the weekly Shabbos lecture, one shows that worldly, physical pleasure is more important to him than Torah study. One who makes Torah study the primary part of his life and makes his physical needs secondary is assured of success with his livelihood. Conversely, one who makes his physical needs primary and his Torah study secondary will lose his wealth.
(b) The IYUN YOSEF finds a common denominator between these three sins. They all demonstrate a person's greed. A master does not free his Eved for no reason; it must be that the cost of upkeep of the Eved was not worth maintaining him, and therefore the master, out of greed, freed him. A greedy person might utilize Shabbos -- when one is free from having to work and being involved in business pursuits -- as an ideal time to inspect his properties so that he does not have to waste his valuable time during the rest of the week to do so. Similarly, a greedy person will conduct his Shabbos meals while everyone else is in the Beis ha'Midrash listening to the Rav's lecture. By conducting his meals at that time, the greedy person will avoid having to share his feast with poor people. Hash-m punishes such acts of greed by taking away a person's wealth.