Likutei Sichos, vol 27, Behar 2, part 1 Rabbi Chaim Wolosow
https://www.torahrecordings.com/likutei-sichos/027/012_002 Behar: What Will We Eat? The Wise Son and the Blessing of Shemittah Why does the Torah ask, “What will we eat?” The Rebbe explains this is not a question of doubt, but of the wise son seeking understanding. Shemittah teaches that Hashem’s blessing can transcend nature, and even a weak generation can bring the Geulah.