4 Then this message came to Isaiah from the Lord : 5 "Go back to Hezekiah and tell him, 'This is what the Lord, the God of your ancestor David, says: I have heard your prayer and seen your tears. I will add fifteen years to your life, 6 and I will rescue you and this city from the king of Assyria. Yes, I will defend this city.
Matthew Henry's Commentary on Isaiah 38:4-6
Commentary on Isaiah 38:1-8
(Read Isaiah 38:1-8)
When we pray in our sickness, though God send not to us such an answer as he here sent to Hezekiah, yet, if by his Spirit he bids us be of good cheer, assures us that our sins are forgiven, and that, whether we live or die, we shall be his, we do not pray in vain. See 2 Kings 20:1-11.