Isaiah 38:6

“And I will deliver thee and this city out of the hand of the king of Assyria, &c.] So that it seems that Hezekiah’s sickness was while the king of Assyria was near the city of Jerusalem, and about to besiege it, and before the destruction of the Assyrian army; unless this is said to secure Hezekiah and the inhabitants of Jerusalem from all fears of a return of that king, to give them fresh trouble: and I will defend this city; from the present siege laid to it, ruin threatened it, or from any attack upon it, by the Assyrian monarch.”

“In Kg2 20:8, after this verse comes the statement which is put at the end, in order not to interrupt God's message (Isa 38:21-22) by Isaiah (Isa 38:5-8). will deliver--The city was already delivered, but here assurance is given, that Hezekiah shall have no more to fear from the Assyrians.”

“And I will deliver thee and this city - The purport of this promise is, that he and the city should be finally and entirely delivered from all danger of invasion from the Assyrians. It might be apprehended that Sennacherib would collect a large army, and return; or that his successor would prosecute the war which he had commenced. But the assurance here is given to Hezekiah that he had nothing more to fear from the Assyrians (see the notes at Isaiah 31:4-5; Isaiah 37:35). In the parallel place in 2 Kings 20:6, it is added. ‘I will defend this city for mine own sake, and for my servant David’s sake.’ In the parallel passage also, in 2 Kings 20:7-8, there is inserted the statement which occurs…”

“38:6 I will rescue you . . . I will defend this city: This promise refers to the rescue of Jerusalem (chs 36–37); it also provides a greater context for understanding Hezekiah’s sickness and healing. Just as Hezekiah received another fifteen years, Jerusalem also received a temporary reprieve (see ch 39).”

“Isa 12:6, Isa 31:4, Isa 37:35; Ch2 32:22; Ti2 4:17 Isaiah 38:7”