Parashas Behar · Aliyah 2 · Passuk 25:15
Chabad.org — English translation + Rashi
Torah Temimah cites Sifra / Arakhin 29b.
English: “According to the number of years after the Yovel.” This teaches that the seller is not permitted to redeem [the field] for less than two years.
Classical derasha (Sifra / Bavli Arakhin).
A field sold may not be redeemed by the seller for fewer than two years, even if multiple harvests occur within that period.