Komentaryo sa Mga Bilang 36:4: Rashi, Kli Yakar, Sforno & Rabbeinu Bahya

ואם יהיה היבל may mean AND IF THERE WILL BE THE JUBILEE — From this R. Judah said: The observance of the Jubilee will cease at some time or other (Sifra, Vayikra Dibbura d'Nedavah, Section 13 1 on Leviticus 2:14).

“And if it will be the Jubilee, etc.” The Rabbis of blessed memory explained (Jerusalem Talmud Ketubot 9:1) that if here means “even,” and the meaning is that even if the Jubilee comes, nonetheless this field will not be released in the Jubilee. It is difficult to interpret if as meaning “even though,” and even if you were to say that it does mean that, it is still difficult [to understand]: From where would we derive that the Jubilee would be a remedy for this field [being transferred to another tribe]? If so, what was the initial assumption [of the verse], and what is it coming to teach us?
Furthermore, one must be precise about the verses that state, And their inheritance will be diminished from the inheritance of our fathers, and it will be added to the inheritance of the tribe to which they will belong, and from the lot of our inheritance it will be diminished. Why do I need the word diminished twice? And why is it first called the inheritance of our fathers and afterward called our inheritance? And afterward, it returns and says, And if it will be the Jubilee, etc., and from the inheritance of his tribe it will be diminished. Surely this change means something.
Additionally, it is difficult [to understand] why would their inheritance be [considered] diminished; does it not say To the numerous you shall increase and to the few you shall decrease (Numbers 33:54)?

ואם יהיה היובל...יגרע נחלתן, even in the event that we will not now conquer the whole land, as predicted in Exodus 23,30 that the land would be conquered in stages, progressively, so that each tribe would have to conquer the area it laid claim to, a person who had sold his share or potential share could not claim exemption form the war of conquest seeing that the land he had sold would be restored to him in the Jubilee year. In any event it would remain part of his tribe’s ancestral heritage. However, the share given to the daughters of Tzelofchod which would not be restored to their tribe in the Jubilee year, would furnish an excuse to members of their tribe not to bother to fight for that piece of land, and they would allow the present owners to remain there. At any rate, the argument of the family of Machir of Menashe was that the most recent legislation could result in the whole principle of sharing out the land by lottery being partially aborted.

ואם יהיה היבל may mean, too: AND WHEN THERE WILL BE THE JUBILEE [THEN WILL THEIR INHERITANCE BE ADDED TO THE INHERITANCE OF THE TRIBE TO WHICH THEY SHALL BELONG] — meaning: This is no sale of land so that it returns to the original owner at the Jubilee, for a heritage never returns. Therefore even when the Jubilee will be, the inheritance will not return to its tribe, and it will follow that it will be added על נחלת המטה אשר תהיינה להם TO THE INHERITANCE OF THE TRIBE TO WHICH THEY SHALL BELONG.