Nasai

The purpose is that transactions should proceed in a natural manner. Artificial scarcity should not be created, nor should inflation be caused through hoarding; rather, as production comes in, it should be sold in the market and continue to reach those in need. It is evident that if a city dweller sells the goods of a villager, he will engage in hoarding and create artificial scarcity so that the produce can be sold at a higher price for his own benefit.

Hadith Commentary:
Benefits and Issues:
By performing prayer (salah), a person's minor sins (saghirah) are forgiven, because the effects of minor sins manifest on the outward body, and thus their removal is easy. Just as if dirt on the body does not penetrate the pores or if filth is not absorbed into the clothing, then washing it is easy. However, if the dirt that attaches to the body seeps inside, then even cleaning it with soap is not easy. The effects of major sins (kabirah) impact a person's heart, and therefore, they are not forgiven except through repentance (tawbah) or the special mercy of Allah Ta'ala.