Halakhah su Levitico 25:39

That is that He commanded us that there be [the possibility of] redeeming lands sold within the city wall only until the end of a year. And after [that] year, it remains with the buyer and does not go out in the Jubilee. And that is His, may He be exalted and may His name be blessed, saying, "And if a man sells a dwelling house in a walled city" (Leviticus 25:39). And the regulations of this commandment have already been explained in Arakhin. But it is only practiced in the Land [of Israel]. (See Parashat Behar; Mishneh Torah, Sabbatical Year and the Jubilee 12.)

That we not make a Hebrew slave perform demeaning work, like the work of a Canaanite (gentile) slave: That we not make a Hebrew slave perform work that is very demeaning and humiliating, which is the way to make a Canaanite slave work - as it is written (Leviticus 25:29), "do not have him work with the work of a slave." And they, may their memory be blessed, said in Sifra, Behar, Chapter 7:2 in explanation of this matter, "He should not carry your cushion" (see Sefer HaMitzvot LaRambam, Mitzvot Lo Taase 257) - which is a small cloth that people make to sit upon in every place if they tire - and it is the way of a demeaned slave to take this [item] and carry it behind his master. And they said likewise (Sifra, Behar, Chapter 7:2), "Nor should he carry his vessels in front of him into the bathhouse." And they, may their memory be blessed, elucidated these types of work, and the law is the same for anything that is similar to them. It comes out that a person should be mindful of which type of work he orders his Hebrew slave to perform. And this is part of the principle which they, may their memory be blessed, said (Kiddushin 22a), "Anyone who acquires a Hebrew slave is like he has acquired a master for himself." Nonetheless, from that which the verse states (Leviticus 25:40), "Like a laborer, like a boarder shall he be with you," it should be learned that a man may command him to do anything that it is the way of people to command a laborer or a boarder. And truthfully, a laborer - who is a free man - is usually not employed for degrading work; and likewise a boarder - who is a man who comes to live in a different land. And the way of boarders is is to do the work of the homeowner with whom they are living, from their [own] will - therefore [a householder] will not do very demeaning work with him. And hence Scripture sated, "Like a laborer, like a boarder shall he be with you," because these two men - even though they do work - their work is not usually demeaning work. Still, the slave must behave according to the way of a slave and honor his master with all of his might, and not become haughty with all that we have said.