Musar su Deuteronomio 25:3

And there are some [negative commandments] that some of the masses do not keep the main [negative commandment], such as wounding and hitting. For one that hits his fellow violates two negative commandments, as it is stated (Deuteronomy 25:3), “You shall strike him forty; you shall not add, lest you add.” And many transgress these negative commandments by hitting their wives. And our Rabbis, may their memory be blessed, said (Sanhedrin 58b), “Anyone who raises his hand to strike another, even if he does not strike him, is called wicked - as it is stated (Exodus 2:13), ‘and he said to the wicked one, “Why should you strike your friend?”’ ‘Why did you strike,’ is not stated, but rather, ‘should you strike.’” And Job said (Job 31:21), “If I raised my hand against the fatherless.” And our Rabbis, may their memory be blessed, said (Sanhedrin 58b) [that] Rav Huna would cut off the hand of the striker. He would say, “And the high arm shall be broken” (Job 38:15).

We shall expand somewhat on the severity of theft, which, when one reflects upon it, will make him tremble. The Midrash writes: "Lest you say that I have given you the Torah for your evil — I have given it to you only for your good." Now this obviously presents a question: How could one [even] suspect that the Holy One Blessed be He, the source of good and lovingkindness could give us the Torah for our evil? But the explanation is as follows. There are in the Torah several sections on punishing sinners — with death, stripes, or monetary payment — which might lead one to believe that the Holy One Blessed be He is angry with the sinner, wherefore He prescribed these punishments for his evil. But, in truth, this is not so. The Holy One Blessed be He brings punishments upon him to cleanse him. For our sages have said (Makkoth 23a) about one who is liable to stripes because he has transgressed a negative commandment of the Torah: (Devarim 25:3): "And your brother shall be demeaned before your eyes" — "Once he has been demeaned [by receiving stripes], he is like your brother." And, similarly, even with one liable to the death penalty, we tell him: "Confess, for all who confess have a share in the world to come." And this serves as a paradigm for all such things in the Torah, as in the instance of a thief (Shemoth 22:2): "If he lacks [the money to return], he should be sold for his theft," in order to return the money to the owner, so as to cleanse himself of the sin of theft, even though through this he descends from his sanctity. For ab initio, a Jew is forbidden by negative commandment to wed a handmaid, it being written (Devarim 23:18): "And there shall be no harlot from the sons of Israel"; but after he is sold by beth-din he descends from his sanctity and weds a handmaid, and his children are slaves forever. In any event, the Torah descends to "the end of the matter," that this is preferable for him rather than having the sin of theft remain upon him and returning and coming to Gehinnom as a gilgul [(a reincarnation)].

Commandment 595 warns the person administering this penalty not to administer any excess lashes, nor to administer more lashes than the amount the guilty party is considered able to absorb without endangering his health. The Torah (25,3) states: "He may administer up to 40 lashes, no more."