Comentário sobre Levítico 25:22

עד השנה התשיעית UNTIL THE NINTH YEAR — i. e. until the Feast of Tabernacles of the ninth year which is the time when the crop of the eighth year comes ‎(בא תבואתה) into the house (the granaries). For during the whole summer-time (the fruits) remained in the fields inthe barns, and in Tishri was the time for gathering them into the house. Sometimes indeed it th)e soil) had to bring forth fruits for four years, viz., during the sixth year preceding the seventh “Shemittah” (i. e. in the forty-eighth year of the Jubilee-period) when they had to refrain from agricultural work two successive years, viz., the Sabbatical year and the Jubilee immediately following it. This verse, however, (which mentions only an increase sufficient for three years) is said (written) with reference to all other (i. e. ordinary) Sabbatical years.

וזרעתם את השנה השמינית, "And you will seed the eighth year, etc." The Torah had to spell this out on account of having written that the harvest of the sixth year would last for three years. We might have thought that if the harvest of the sixth year lasts into the ninth year why sow in the eighth year? Surely G'd would not perform an unnecessary miracle! The Torah provides the reason by writing that the people were to enjoy the harvest brought in during the sixth year until the harvest of what was planted in the eighth year was at hand. The lesson of the verse is that a harvest which is three years old is superior to grain from the new harvest. (Baba Batra 91 confirms this).

וזרעתם את השנה השמינית, ”you will seed in the eighth year, etc.” Here the Torah reverts to the natural state of affairs, planting a crop that will develop without miraculous input by G’d, as did the one in the sixth year. You will not have to extend yourselves especially, as what the land had provided in the sixth year is sufficient until the crop planted in the eighth year had matured in the normal way. Rashi does not explain our verse in this manner.