Musar su Levitico 25:46

לעולם בהם תעבודו . This rule of owning Gentile slaves permanently (25,46) (as opposed to Jewish servants), is rooted in the status of Canaan as a slave since the days of Noach. The status was conferred upon him in retaliation for his having uncovered the nakedness of his grandfather. The curse is connected with the original pollutant introduced into Eve as a result of the serpent having mated with her. Israel are called אחיך, having been created in the צלם אלוקים, the image of G–d. When one does not behave like a "brother," אחיך, by such deeds as behooves a person created in the image of G–d, then the Torah will apply the epithet ובאחיך to such a person.

“But as for your brothers of the Children of Israel, no one shall rule ruthlessly over the other” (Leviticus 25:46). A man may not subjugate his fellow. And if his fear is upon them or they are embarrassed to violate his word, he should not command them to do [anything at all], except from their [own] will and for their benefit - even to heat up a jug of water or to go on an errand to the town square to buy as much as a loaf of bread. But it is permitted to command anything he wants to a man who does not behave properly.

Even from an animal he must keep cruely far away, as it is written: "A righteous man knows the needs and capacity of his animal" (Prov. 12:10), so as not to burden it too much and not to let it hunger, and so it is written : "When you see the donkey of one who hates you lying under his burden you shall restrain yourself from passing by; you shall surely work with him to release the animal" (Exod. 23:5). And our rabbis said: "The laws against causing pain to living creatures are from the Torah" (Baba Mezi'a 32b). And if you are a man who inspires fear, and the fear of you is upon other human beings so that they are afraid to refuse your requests, be very careful not to overburden them even by asking them to warm a flask of water or sending them on an errand to the market square to buy merely a loaf of bread. And on this subject it is said in the Torah: "But over your brothers the children of Israel you shall not rule one over another harshly" (Lev. 25:46). And as to this precept we have been warned that a man should not cause his companion to work at hard labor and not command him to anything unless he does it willingly and knowingly. A Canaanite slave may be directed to do hard labor, yet even in this latter case the pious way is to be merciful to him and not to make the yoke too heavy and not shame him, not by a blow and not by words, for Scripture has permitted you to receive his labor but not to shame him (Niddah 47a). And the master must speak quietly to his Canaanite slave even though there is a quarrel between them, and he must listen to his slave's complaints, and so did Job say: "If I did despise the cause of my man servant or of my maid servant when they contended with me — What then shall I do when God rises up and when He remembers some wrong He claims I did to a slave, what shall I answer him. Did not he that made me in the womb make him (the Canaanite slave) also? And did not the One fashion us (both) in the womb?" (Job 31:13-15).