And whatsoever shall be left of the house of Juda, shall take root downward, and bear fruit upward.

And it hath continued, The escaped of the house of Judah That hath been left, to take root beneath, And hath made fruit upward.

And those of Judah who are still living will again take root in the earth and give fruit.

And whatever will have been left behind, from the house of Judah, shall send a root downward, and shall bear fruit upward.

The remnant that is escaped - Terrible ravages seem to have been committed in the first attack (2-Kings 18:13 note). And though the second invasion was comparatively harmless, yet it probably fell heavily on the cities of the west and the southwest. Thus the "escaped" were but "a remnant."
Bear fruit upward - The flourishing time of Josiah is the special fulfillment of this prophecy 2-Kings 23:15-20.

The remnant - shall yet again take root - As your corn shall take root in the soil, and bring forth and abundantly multiply itself, so shall the Jewish people; the population shall be greatly increased, and the desolations occasioned by the sword soon be forgotten.

And the remnant that is escaped of the house of Judah shall yet again take (u) root downward, and bear fruit upward.
(u) The Lord will multiply in great number that small remnant of Judah that escaped.

The remnant, &c. - They shall be well fixt and provided for themselves, and then do good to others.