Passage
And Hezekiah slept with his fathers: and Manasseh his son reigned in his stead.
And Hezekiah slept with his fathers: and Manasseh his son reigned in his stead.
2 Kings 20:19 Then said Hezekiah unto Isaiah, Good is the word of the LORD which thou hast spoken. And he said, Is it not good, if peace and truth be in my days?
2 Kings 20:20 And the rest of the acts of Hezekiah, and all his might, and how he made a pool, and a conduit, and brought water into the city, are they not written in the book of the chronicles of the kings of Judah?
2 Kings 20:21 And Hezekiah slept with his fathers: and Manasseh his son reigned in his stead.
The verse centers on "hezekiah", "slept", "fathers", "manasseh", "reigned", and "stead". It is saying that the verse draws attention to "hezekiah" and "slept", so its meaning should be read from those terms before moving to application.
The prior verse says "And the rest of the acts of...", giving immediate footing for "hezekiah" and "slept". In 2 Kings context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "hezekiah" and "slept" with trust shaped by these words, not by a vague optimism outside the passage.