Isaiah 36:30

And this shall be a sign unto thee, a token whose fulfillment would assure him of the truth of the entire prophecy, Ye shall eat this year such as groweth of itself, volunteer grain; and the second year that which springeth of the same, for the Assyrian invasion had not only destroyed the harvest of the last year, but had also made it impossible to put out the new crop; and in the third year, that is, about one year after the present prophecy, sow ye, this being done in the fall of the year, and reap, and plant vineyards, and eat the fruit thereof, everything being restored to its usual order by that time.