Hear the word of the Lord of hosts - Hear what the mighty God that rules in heaven says of this. This is an instance of great fidelity on the part of the prophet. He felt himself sent from God in a solemn manner to rebuke sin in a monarch, and a pious monarch. It is an instance that strikingly resembles the boldness and faithfulness of Nathan when he went to David, and said, 'Thou art the man' 2 Samuel 12:7.

Then said Isaiah to Hezekiah,.... Now he begins to let him know that he came not of himself, and that he did not ask these questions to gratify his own curiosity, but that he came from the Lord, and with a word of rebuke from him:

hear the word of the Lord of hosts; a greater King than thou art, who art so elated with thy riches, and grandeur, and fame; or than the king of Babylon, whose ambassadors these are; even the King of kings, and Lord of armies above and below, and who is able to make good every word that is spoken by him, and therefore should be solemnly attended to.

Then said Isaiah to Hezekiah, Hear the word of the LORD of hosts:

5. Lord of hosts-who has all thy goods at His disposal.

39:1-8 This chapter is the same as 2Ki 20:12-19.