Halakhah for Exodus 20:14

One revolution, which includes all the spheres, is from east to west. The twelve zodiacal constellations¹³ The order of the zodiacal constellations and zodiacal signs is: Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius, and Pisces. complete a revolution in twenty-four hours,¹⁴ This is known as a “sidereal day,” which is the interval between two successive passes of the vernal equinox point over the meridian. A sidereal day is slightly less (by about four minutes) than a “solar day,” the interval of time between two successive passes of the sun across the meridian. Apparently Ibn Ezra used sidereal time rather than solar time. and the seven planets¹⁵ The seven planets known at that time are: Moon, Mercury, Venus, Sun, Mars, Jupiter, and Saturn. also finish their revolutions in approximately the same amount of time. The second revolution is from west to east. It also includes all of the spheres, for the poles of the spheres of the planets are similar to the poles of the zodiacal sphere.¹⁶ All of the lower eight spheres that contain the planets and the fixed stars rotate at various rates around the earth from west to east. Only the sun maintains the path of the ecliptic, not deviating south nor north. It traverses the complete zodiac in 365 days, five hours, and fractions of an hour. This is a solar year and the true year, for the days return a second time to what they were in the preceding year. For this reason a year is called “shana” (repetition).

To not covet: To not bring up to our thoughts to do a machination to take for ourselves that which is someone else's of our brothers, as it is stated (Exodus 20:14), "You shall not covet the house of your neighbor, etc." And they, may their memory be blessed, have already proven (Mekhilta d'Rabbi Yishmael 20:14:3) from a different verse [in which] it is written (Deuteronomy 7:25), "do not covet, etc. and you shall take for yourself," that the negative commandment of "you shall not covet" is not completed until he acts upon it. And even if he gives money to his fellow for the object [that he coveted], he [still] transgresses the negative commandment of "you shall not covet." As the negative commandment of "you shall not covet" is not rectified by the giving of money, so long as he took it from him coercively. Such is the true explanation of our Rabbis, may their memory be blessed.

The prohibition of lo tachmod (Shemot 20:14) forbids one to pressure another to sell or give him an item the former desires (Shulchan Aruch C.M. 359:10). While young man number probably did not covet a specific item, the prohibition of lo tachmod nonetheless teaches that it is wrong to pressure someone to do something he does not wish to do. Indeed, the Shulchan Aruch (E H. 154:21) does not permit pressuring a husband to give his wife a get unless the husband’s improper behavior justifies such pressure (see Gray Matter 1:19 for further discussion of this issue).