Isaiah 38:6

6 I'll rescue you and defend this city from the control of the king of Assyria.'" [38:21] Then Isaiah said, "Take a fig cake, and place it over the boil so that the king will get well." [38:22] Hezekiah asked, "What is the sign that I'll go to the LORD's temple?"

Isaiah 38:6 Meaning and Commentary

Isaiah 38:6

And I will deliver thee and this city out of the hand of the
king of Assyria
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.

Isaiah 38:6 In-Context

4 Then the LORD spoke his word to Isaiah,

5 "Go and say to Hezekiah, 'This is what the LORD God of your ancestor David says: I've heard your prayer. I've seen your tears. I'm going to give you 15 more years to live.

6 I'll rescue you and defend this city from the control of the king of Assyria.'" [38:21] Then Isaiah said, "Take a fig cake, and place it over the boil so that the king will get well." [38:22] Hezekiah asked, "What is the sign that I'll go to the LORD's temple?"

7 [Isaiah said,] "This is your sign from the LORD that he will do what he promises.

8 The sun made a shadow that went down the stairway of Ahaz's upper palace. I'm going to make the shadow go back ten steps." So the sun on the stairway went back up the ten steps it had gone down.