Isaiah 37:30-32

30And this [shall be] the sign unto thee: there shall be eaten this year such as groweth of itself; and in the second year that which springeth of the same; but in the third year sow ye, and reap, and plant vineyards and eat the fruit thereof.

31And the remnant that is escaped of the house of Judah shall again take root downward, and bear fruit upward;

32for out of Jerusalem shall go forth a remnant, and out of mount Zion they that escape: the zeal of Jehovah of hosts shall do this.