פירוש על בבא בתרא 5:7

What is it teaching us? That when it is not subject to the law of division: [The question is asked] even though it is teaching that it is considered damage. This is [the question's] explanation: What is it teaching us by that which it is speaking about when it is not subject to the law of division? Let it make us understand about when it is subject to the law of division that [even though they did not want] (when they wanted), they must divide it. It is [however still] a wonder! Behold it is teaching us that even when it is not subject to the law of division - that it can be said that [when] one [agreed to a partition, but] did not agree to making a wall, [he must still do so], as it explained earlier.