Musar su Levitico 19:11

“You shall not steal; you shall not deal deceitfully or falsely” (Leviticus 19:11). Our Rabbis said (Bava Metzia 61b), “‘You shall not steal’ in order to aggravate” - that one should not say, “I will steal vessel x, in order that he will be pained and I will make him aggravated (nakot, [like] the usage, ‘and you shall aggravate yourselves’ [in] Ezekiel 36:31), be careful in watching his vessels and give it back to him afterwards.” And it is likewise forbidden to take vessels from the house of one’s fellow in the way of theft, to use them and [then] return them to him. And one may not steal what is his from behind the thief - so that he will not appear to be a thief (Sifra, Kedoshim, Section 2:2).

And this is the thing about the group of liars - the content of this group is divided into nine sections:
The first section: The lying man that left the Torah and does evil and destroys with the response of his mouth - like one who contradicts his countryman about a deposit or a transfer or the wage of a wage-worker, as it is stated (Leviticus 19:11), “you shall not deal deceitfully or falsely, a man towards his countryman.” And likewise, one who bears false witness against his neighbor; and it is said (Exodus 20:13), “you shall not bear false witness against your neighbor.” And included in this section is deception and fraud in commerce and in partnerships; and it is stated (Leviticus 25:14), “you shall not cheat, one man, his brother.” And it is [also] stated (Psalms 55:12), “fraud and deceit never leave its square.” And he is called a man of iniquity and a ruffian; and he is the heaviest with iniquity from the groups of the evildoers, as we have discussed in the Gates of Fear of Sin (no longer extant). And the characteristics of this man of iniquity are that he winks his eyes and rolls his fingers, as it is written (Proverbs 6:12-13), “A ruffian individual, a man of iniquity, etc. Winking his eyes, etc.”

Many negative commandments refer to theft such as "you shall not steal" (Shemot 20:13, "you shall not rob" Vayikra (19:13), "you shall not oppress" (ibid); "nor deny nor lie one to another" (Vayikra 19:11), "you shall not oppress one another" (Vayikra 25:14), "You shall not push back your neighbor's boundary" (Devarim 19:14). All these are divisions of the laws of theft which apply to many common business transactions and each one includes many prohibitions under it.