Both passages describe the same event where the prophet Isaiah tells King Hezekiah to set his house in order because he will die. This shows the consistency of the prophetic message across different books.
2 Kings 20:5 records God's promise to heal Hezekiah in response to his prayer, similar to James 5:15, which speaks of the prayer of faith saving the sick.
God promises to defend Jerusalem for His own sake and for David's sake, echoing His earlier promise in 2 Kings 19:34 to protect the city from the Assyrians.
Thematic focusDivine Protection, Covenant with David.