“They returned from scouting the land at the conclusion of forty days” (Numbers 13:25). You find that they went from the south to the north in forty days, but in forty days they traversed it in its entirety?13The land is too large to traverse by foot in forty days. Rather, it was revealed before the Holy One blessed be He that they would come and speak slander about the Land, and years of travail would be decreed upon them, one year for each day. The Holy One blessed be He miraculously shortened the path before them.
How the Spies Crossed All of Israel in Forty Days
Bamidbar Rabbah 16:15