레위기 25:25의 Musar

כי ימוך אחיך . Rashi has already explained that the connection between this and the previous paragraph is to teach us the lesson that one must not sell one's land in ארך ישראל unless one has absolutely no other choice. If one sells for, say, speculative reasons, one may find oneself impoverished, as indicated in 25,25.

In some instances one scholar may see as many as three distinct negative commandments involving the consumption of חמץ, leavened things, whereas another scholar considers that there is only a single culpability for all of these prohibitions of חמץ, be it before Passover, during Passover, or after Passover. Even such universally known precepts as the recital of קריאת שמע, are subject to debate, one Rabbi claiming it is a Biblical precept, another saying that it is merely a Rabbinic injunction.