This week's Torah portion describes the laws of buying and selling. Our sages teach us that a person can not acquire something that has not yet 'entered this world'. However, a promise to donate something that does not yet exist must be kept when it does come into existence.
These classes teach the day’s section of the weekly Torah portion. The lesson is taught using the original Hebrew text with the indispensable commentary of Rashi—both translated and elucidated so that anyone can follow along.