2 Chronicles 32:33
And Hezekiah slept with his fathers, and they buried him in the chiefest of the sepulchres of the sons of David: and all Judah and the inhabitants of Jerusalem did him honour at his death. And Manasseh his son reigned in his stead.
The verse closes the reign by recording that Hezekiah slept with his fathers, was buried in the chiefest of the royal tombs of the sons of David, was honoured at his death by all Judah and the inhabitants of Jerusalem, and was succeeded by his son Manasseh. Its setting is his coming to Judah's throne as the northern kingdom was falling, beginning political and religious reform, throwing off Assyrian rule, and relying on God when the Assyrians threatened Jerusalem, with God defeating them in response to his and the people's humility and prayers. He is counted among the good kings, whose benevolent administration was attended by prosperity.
His reign teaches that doing duty brings blessing and that God helps His people when they seek Him wholeheartedly. As part of the historical record of Judah's kings, the verse provides a setting for biblical events and carries spiritual lessons within God's revelation culminating in Christ. Manasseh, who was born three years after Hezekiah's healing, succeeded him and ruled wickedly for much of his long reign, though he was later repentant. Hezekiah himself backslid for a time, with consequences for the people coming about a hundred years later.
The surrounding chapter shows the Assyrian army was with the king of Assyria at Libnah, not near Jerusalem, when the angel slew 185,000 men, which rules out that destruction as the fulfillment of Isaiah 30:33. The phrase slept with his fathers shows death is spoken of as sleep, meaning the dead are unconscious, without knowledge or awareness until they are raised. The wording connects going to one's fathers with burial in the grave, not conscious existence in heaven.