Leviticus 25:36 - Ellicott's Commentary On The Whole Bible

Take thou no usury of him, or increase. — The first thing to be done to the impoverished Israelite is to supply him with the means to recover himself without any interest. The authorities during the second Temple defined the words which are translated “usury” (nesheck) and “increase” (tarbith, or marbith) as follows: If a person lends to another a shekel worth four denarii, and gets in return five denarii, or if he lends him two sacks of wheat, and receives back three, this is usury. If one buys wheat for delivery at the market price of 25 denarii a measure, and when it rises to 30 denarii he says to the vendor, “Deliver me the wheat, for I want to sell it and buy wine,” and the vendor replies,” I will take the wheat at 30 denarii and give thee wine for it,” though he has no wine, this is increase. The “increase” lies in the fact that the vendor has no wine at the time, and that he may possibly lose again by the rise in wine. Accordingly the former is a charge upon money, whilst the latter is on products.