Negative commandment · Lo Ta’aseh #266 of 613
Not to desire
שלא להתאוות
The verse · Devarim 5:18
וְלֹא תַחְמֹד אֵשֶׁת רֵעֶךָ וְלֹא תִתְאַוֶּה בֵּית רֵעֶךָ שָׂדֵהוּ וְעַבְדּוֹ וַאֲמָתוֹ שׁוֹרוֹ וַחֲמֹרוֹ וְכֹל אֲשֶׁר לְרֵעֶךָ
“Neither shalt thou covet thy neighbour’s wife, neither shalt thou desire thy neighbour’s house, his field, or his manservant, or his maidservant, his ox, or his ass, or anything that is thy neighbour’s.”
The Rambam’s words
Not to desire, as [Deuteronomy 5:18] states: "Do not desire your neighbor's house."
שלא להתאוות, שנאמר "לֹא תִתְאַוֶּה בֵּית רֵעֶךָ" (דברים ה, יז).
Why · Sefer HaChinuch #416
Not to desire the money of your friend
“The root of this commandment is known, since distancing theft from among men is useful for all, and the intellect is a trustworthy witness to the thing.”
Who & when
“And it is practiced in every place and at all times by males and females.”
Where in the Mishneh Torah
Hilchot Robbery and Lost Property הלכות גזילה ואבידה