Why does the Torah repeat "Yovel hi, Sh'nas ha'Chamishim Shanah"?
Ramban (Refer to 25:10:5:2***). The Torah now adds that the sole objective of the fiftieth year is that it should be 'Yovel' - that one should desist from planting and from reaping, and that, above all, everyone should return to his possession, in fulfillment of the word "Yovel", according to its literal meaning.
Ramban (according to Kabalah): Refer to 25:10:3:2.
Seforno: This Pasuk teaches us that Yovel cuts two ways, inasmuch as , just as the fields are released from the ownership of the purchasers, so too, must they go free from the ownership of the original owners, to become Hefker for the duration of the year.
Torah Temimah (citing Rosh Hashanah, 9a): "It comes to teach us that the fiftieth year is Yovel. 1
But not the first year of the following cycle as per the opinion of Rebbi Yehudah.
Why does the Torah add the words "Sh'nas ha'Chamishim Shanah"?
Rashi: To teach us that the Kedushah of the Yovel year terminates at the end of the fiftieth year, and does not extend to the fifty-first. 1
On account of Tosefes Yovel (as we find by Yom Kipur).
What are the implications of "ve'Lo Sivtz'ru es Nezirehah"?
Ramban: Refer to 25:5:4:2.
Rashbam: It implies that one may not harvest the grapes that have grown. 3
Rashi: In the same way as the Torah stated by Shemitah. It transpires that there are two consecutive years of Kedushah, the forty-ninth year, which is Shemitah, and the fiftieth, which is Yovel.
It is not clear as to why Rashi does not comment on "ve'Lo Siktz'ru es Sefichehah"?
Seforno: And the same applies to the Sefichim of the crops.