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.

The sign is followed in 2 Kings 19:30, 2 Kings 19:31 by the distinct promise of the deliverance of Judah and Jerusalem, for which Isaiah uses the sign itself as a type. "And the remnant that is escaped of the house of Judah will again strike roots downwards and bear fruit upwards; for from Jerusalem will go forth a remnant, and that which is escaped from Mount Zion; the zeal of Jehovah will do this." שׁרשׁ יסף, to add roots, i.e., to strike fresh roots. The meaning is, that Judah will not succumb to this judgment. The remnant of the nation that has escaped from destruction by the Assyrians will once more grow and flourish vigorously; for from Jerusalem will a rescued remnant go forth. פּליטה denotes those who have escaped destruction by the judgment (cf. Isaiah 4:2; Isaiah 10:20, etc.). The deliverance was attached to Jerusalem or to Mount Zion, not so much because the power of the Assyrians was to be destroyed before the gates of Jerusalem, as because of the greater importance which Jerusalem and Mount Zion, as the centre of the kingdom of God, the seat of the God-King, possessed in relation to the covenant-nation, so that, according to Isaiah 2:3, it was thence that the Messianic salvation was also to proceed. This deliverance is traced to the zeal of the Lord on behalf of His people and against His foes (see at Exodus 20:5), like the coming of the Messiah in Isaiah 9:6 to establish an everlasting kingdom of peace and righteousness. The deliverance of Judah out of the power of Asshur was a prelude and type of the deliverance of the people of God by the Messiah out of the power of all that was ungodly. The צבאות of Isaiah is omitted after יהוה, just as in 2 Kings 19:15; though here it is supplied by the Masora as Keri. - In 2 Kings 19:32-34 Isaiah concludes by announcing that Sennacherib will not come to Jerusalem, nor even shoot at the city and besiege it, but will return disappointed, because the Lord will defend and save the city for the sake of His promise. The result of the whole prophecy is introduced with לכן: therefore, because this is how the matter stands, viz., as explained in what precedes. אל־מלך, with regard to the king, as in 2 Kings 19:20. מגן יקדּמנּה לא, "he will not attack it with a shield," i.e., will not advance with shields to make an attack upon it. קדּם with a double accusative, as in Psalm 21:4. It only occurs here in a hostile sense: to come against, as in Psalm 18:19, i.e., to advance against a city, to storm it. The four clauses of the verse stand in a graduated relation to one another: not to take, not even to shoot at and attack, yea, not even to besiege the city, will he come. In 2 Kings 19:33 we have 2 Kings 19:28 taken up again, and 2 Kings 19:32 is repeated in 2 Kings 19:33 for the purpose of strengthening the promise. Instead of בּהּ יבוא we have in Isaiah בּהּ בּא: "by which he has come." The perfect is actually more exact, and the imperfect may be explained from the fact that Sennacherib was at that very time advancing against Jerusalem. In 2 Kings 19:34 we have אל גּנּותי instead of the על גּנּותי of Isaiah: על is more correct than אל. "For my sake," as Hezekiah had prayed in v. 19; and "for my servant David's sake," because Jehovah, as the unchangeably true One, must fulfil the promise which He gave to David (sees at 1 Kings 11:13).

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.

19:30 The remnant, and c. - They shall be well fixt and provided for themselves, and then do good to others.

remnant...: Heb. escaping of the house of Judah that remaineth

19:20-34 All Sennacherib's motions were under the Divine cognizance. God himself undertakes to defend the city; and that person, that place, cannot but be safe, which he undertakes to protect. The invasion of the Assyrians probably had prevented the land from being sown that year. The next is supposed to have been the sabbatical year, but the Lord engaged that the produce of the land should be sufficient for their support during those two years. As the performance of this promise was to be after the destruction of Sennacherib's army, it was a sign to Hezekiah's faith, assuring him of that present deliverance, as an earnest of the Lord's future care of the kingdom of Judah. This the Lord would perform, not for their righteousness, but his own glory. May our hearts be as good ground, that his word may strike root therein, and bring forth fruit in our lives.